In this photograph by Robert L. Knudsen, Lynda Bird Johnson, daughter of President Lyndon B. Johnson and First Lady Lady Bird Johnson, stands at the altar alongside her groom, Marine Corps Capt. Charles S. Robb, on their wedding day, December 9, 1967. The Johnson-Robb wedding took place in the East Room of the White House. Lynda's younger sister, Luci Baines Johnson, in red at right, served as maid of honor while Reverend Canon Gerald N.McAllister, far right, performed the wedding ceremony. Lynda wore a white silk satin-paneled wedding gown designed by Geoffrey Beene featuring embellished vertical lines of silk floss, embroidered flowers, and delicate seed pearls. Her wedding ensemble was topped with a 15-yard-long tulle veil.

In this aerial photograph by Robert L. Knudsen, Tricia Nixon, daughter of President Richard M. Nixon and First Lady Pat Nixon, and Edward Cox stand at the altar in front of invited guests at their wedding on June 12, 1971. Their wedding took place in the Rose Garden on the White House Grounds and was followed by a reception in the East Room. The greenery of the Rose Garden was dotted with roses of reds, pinks, whites, and yellows and the shade of green of the crabapple trees throughout was said to match the shade of the bridesmaids’ layered silk organdy dresses, made by Priscilla of Boston. Though there was an intimate number of invited guests, just beyond it, on the South Lawn, press tents captured the nuptials for the nation.

In this photograph taken by Robert L. Knudsen on June 12, 1971, Tricia Nixon holds hands with her father, President Richard M. Nixon, on the steps of the North Portico following her wedding reception at the White House. Her husband, Edward Cox, her mother, First Lady Pat Nixon, and her sister Julie Nixon Eisenhower are also pictured next to her. The group is surrounded by guests and members of the press. This was the 16th documented wedding to take place at the White House and the first to be held in the Rose Garden. Nixon was the daughter of President Richard M. Nixon and First Lady Pat Nixon. Approximately 400 guests watched the nuptials in the Rose Garden.

In this photograph, Tricia Nixon unwraps presents during a bridal shower that was held in her honor by Second Lady Judy Agnew on June 1, 1971. Seated near Tricia Nixon are, from left to right: her sister Julie Nixon Eisenhower (on floor), former First Lady Mamie Eisenhower, and First Lady Pat Nixon, Tricia's mother. Tricia Nixon married Edward Cox, a law student at the time, in a Rose Garden ceremony on June 12, 1971.

In this photograph taken by Robert L. Knudsen on June 12, 1971, newlywed Tricia Nixon Cox throws her bouquet to guests from the Grand Staircase to the Entrance Hall of the White House below. Standing next to her is her husband Edward Cox. This was the 16th documented wedding to take place at the White House, with their outdoor ceremony the first to be held in the Rose Garden. Nixon was the daughter of President Richard M. Nixon and First Lady Pat Nixon. Approximately 400 guests watched the nuptials in the Rose Garden. The reception took place in the East Room of the White House.

In this photograph, Tricia Nixon unwraps presents during a bridal shower that was held in her honor by Second Lady Judy Agnew on June 1, 1971. Seated near Tricia Nixon (in white at right) are, from left to right: her sister Julie Nixon Eisenhower (on floor), former First Lady Mamie Eisenhower, and First Lady Pat Nixon, Tricia's mother. Tricia Nixon married Edward Cox, a law student at the time, in a Rose Garden ceremony on June 12, 1971.

In this photograph taken on May 26, 1971, by Robert L. Knudsen, Tricia Nixon opens gifts at a bridal shower in her honor, hosted by the women of the press. Sitting on the couch with Tricia are, from left to right: reporter Helen Thomas, Tricia's mother, First Lady Pat Nixon, and her future mother-in-law Anne Crane Delafield (Finch) Cox. Julie Nixon Eisenhower, Tricia Nixon's younger sister sits on the floor. The bridal shower was held at Decatur House. Completed in 1818, Decatur House was the third building on Lafayette Square and its first private residence. It was designed by Benjamin Henry Latrobe, the architect of the Capitol, and several other famous buildings, for Commodore Stephen Decatur (1779-1820) and his wife, Susan Wheeler Decatur. Tragically, on March 22, 1820, Stephen Decatur was mortally wounded during a duel. After his death, his widow Susan Decatur rented out the house to foreign ministers and several secretaries of state. The house was eventually sold and passed through several hands, including the Gadsby family, the U.S. Subsistence Bureau, and the Beale family. Marie Ogle Beale, a society maven, and the last owner, left the house to National Trust for Historic Preservation in 1961. In 2010, the White House Historical Association and National Trust entered into a co-stewardship arrangement of Decatur House.

This photograph of Tricia Nixon and fiancé Ed Cox laughing with guests at a wedding rehearsal luncheon in the Sulgrave Club was taken by Robert L. Knudsen on June 11, 1971. The Sulgrave Club is a private women's club located in Dupont Circle in Washington, D.C. The clubhouse is the former Beaux-Arts mansion on Embassy Row built for Herbert and Martha Blow Wadsworth and designed by noted architect George Cary.

In this photograph taken by Robert L. Knudsen, President Richard Nixon gives his famous "V" sign as he departs the White House for the last time and boards the Marine One helicopter. On August 9, 1974, President Richard Nixon resigned from office. After addressing cabinet members, staff, and White House employees, he and his family departed the White House.

In this photograph, taken by Robert L. Knudsen on November 21, 1968, Lynda Bird Johnson affectionately holds her infant daughter, Lucinda Desha Robb. Prominently pictured in the background is the 1908 painting "Young Mother and Two Children" by American Impressionist artist Mary Cassatt. Born on October 25, 1968, Lucinda was the first child of Lynda and her husband, Capt. Charles S. Robb. When Lucinda was born, Capt. Robb was serving in Vietnam. Lynda Bird and Charles would later welcome two more daughters, Catherine and Jennifer.

This photograph of President Lyndon B. Johnson and his family celebrating Christmas Eve in the Yellow Oval Room was taken by Robert L. Knudsen on December 24, 1967. Here, First Lady Lady Bird Johnson leans over the shoulder of President Johnson to look at a book given by their daughter, Lynda, and son-in-law Capt. Charles S. Robb.

In this photograph, taken by Robert L. Knudsen on December 8, 1972, workmen decorate the chandelier in the Cross Hall for the holiday season. In 1972, First Lady Pat Nixon's holiday decorations drew inspiration from two White House collection paintings by Severin Roesen: "Still Life with Fruit" and "Nature's Bounty." Many of the garlands used to decorate the White House that year, including the one seen here being applied to the Cross Hall chandelier, were entwined with rustic details such as fruit and pinecones.

In this photograph, taken by Robert L. Knudsen on December 8, 1972, workmen decorate the marble columns in the Cross Hall for the holiday season. In 1972, First Lady Pat Nixon's holiday decorations drew inspiration from two White House collection paintings by Severin Roesen: "Still Life with Fruit" and "Nature's Bounty." To complement the seasonal decor, the columns in the Cross Hall were covered with red velour and accented with gold braids.

This photograph of a crèche on display in the East Room was taken by Robert L. Knudsen on December 10, 1966. Funded by Jane and Charles W. Engelhard, Jr. of Far Hills, New Jersey, the wood, gilded fabric, and wrought iron crèche was designed by Sister Parish and Albert Hadley with figures crafted by artist Katherine Bryant with fine material including lace from her own wedding gown. The unusual display incorporated elements of Gothic and contemporary influences. The following year, Mrs. Charles W. Engelhard, Jr. donated an 18th-century crèche to the White House Collection, which has been traditionally displayed in the East Room during the holidays ever since.

This photograph was taken by Robert L. Knudsen on December 13, 1966, following a black tie dinner hosted by President Lyndon B. Johnson and First Lady Lady Bird Johnson for members of the National Council on the Arts. It was established through the National Arts and Cultural Development Act of 1964, before the The National Foundation on the Arts and Humanities Act passed in 1965, establishing the National Endowment for the Arts. The National Council on the Arts consists of appointees selected by the president and approved by the Senate for their contributions to the arts, who advise the Chairman of the National Endowment of the Arts. Many of the founding members of the National Council of the Humanities attended this reception, including Ralph Ellison, Paul Engle, Elizabeth Ashley, Gregory Peck, Oliver Smith, William Pereira, Leonard Bernstein, and Isaac Stern. Here, President and Mrs. Johnson receive guests by the Blue Room Christmas Tree.

This photograph was taken by Robert L. Knudsen on December 13, 1966, following a black tie dinner hosted by President Lyndon B. Johnson and First Lady Lady Bird Johnson for members of the National Council on the Arts. It was established through the National Arts and Cultural Development Act of 1964, before the The National Foundation on the Arts and Humanities Act passed in 1965, establishing the National Endowment for the Arts. The National Council on the Arts consists of appointees selected by the president and approved by the Senate for their contributions to the arts, who advise the Chairman of the National Endowment of the Arts. Many of the founding members of the National Council of the Humanities attended this reception, including Ralph Ellison, Paul Engle, Elizabeth Ashley, Gregory Peck, Oliver Smith, William Pereira, Leonard Bernstein, and Isaac Stern. Here, Lynda Bird Johnson, eldest daughter of the president and first lady, dances with guests in the Entrance Hall as the United States Marine Band performs. The room is festively decorated for the holiday season: visible on the mirror behind the Marine Band is an elaborate "Twelve Days of Christmas" motif, made of colorful felt figures. Similar displays were a tradition in the Entrance Hall throughout Lyndon B. Johnson's presidency.

In this photograph, taken on December 10, 1966, craftsmen assemble a crèche in the East Room. Funded by Jane and Charles W. Engelhard, Jr. of Far Hills, New Jersey, the wood, gilded fabric, and wrought iron crèche was designed by Sister Parish and Albert Hadley with figures crafted by artist Katherine Bryant with fine material including lace from her own wedding gown. The unusual display incorporated elements of Gothic and contemporary influences. The following year, Mrs. Charles W. Engelhard, Jr. donated an 18th-century crèche to the White House Collection, which has been traditionally displayed in the East Room during the holidays ever since.

In this photograph, taken on December 10, 1966, craftsmen assemble figures for a crèche in the East Room. Funded by Jane and Charles W. Engelhard, Jr. of Far Hills, New Jersey, the wood, gilded fabric, and wrought iron crèche was designed by Sister Parish and Albert Hadley with figures crafted by artist Katherine Bryant with fine material including lace from her own wedding gown. The unusual display incorporated elements of Gothic and contemporary influences. The following year, Mrs. Charles W. Engelhard, Jr. donated an 18th-century crèche to the White House Collection, which has been traditionally displayed in the East Room during the holidays ever since.

In this photograph, taken on December 10, 1966, craftsmen assemble a crèche in the East Room. Funded by Jane and Charles W. Engelhard, Jr. of Far Hills, New Jersey, the wood, gilded fabric, and wrought iron crèche was designed by Sister Parish and Albert Hadley with figures crafted by artist Katherine Bryant with fine material including lace from her own wedding gown. The unusual display incorporated elements of Gothic and contemporary influences. The following year, Mrs. Charles W. Engelhard, Jr. donated an 18th-century crèche to the White House Collection, which has been traditionally displayed in the East Room during the holidays ever since.

In this photograph, taken by Robert L. Knudsen on December 15, 1970, President Richard M. Nixon signs bill H.R. 471, also known as the Blue Lake Bill or the Taos Pueblo American Indian Land Deed, in the State Dining Room. President Nixon is accompanied by Taos Pueblo Governor Quirino Romero, Cacique religious leader Juan de Jesus Romero and secretary and interpreter Paul Bernal. The legislation returned Blue Lake and the surrounding mountains to the Taos Pueblo people. The land had been seized by the United States government in 1906.

In this photograph, maitre d'hotel John W. Ficklin surprises President Giuseppe Saragat of Italy with a birthday cake during a State Dinner held in his honor on September 19, 1967. The State Dinner was hosted by President Lyndon B. Johnson and First Lady Lady Bird Johnson on the Italian president's 69th birthday. Prominently displayed on the table is a gilded bronze plateau purchased for the White House during the James Monroe administration. After the dinner in the State Dining Room, guests transitioned to the East Room where they enjoyed selections from the musical "Man of La Mancha" by Richard Kiley, who originated the role of Don Quixote in the Broadway production.

This photograph of the Queens' Sitting Room was taken by Robert L. Knudsen on August 28, 1963, shortly after First Lady Jacqueline Kennedy's redecoration of the room. Located on the Second Floor of the Executive Mansion, this sitting room is adjacent to the Queens' Bedroom. Mrs. Kennedy added the dark blue and white cotton wallpaper and black and gold furniture and was the previous owner of the tea table at center. Mrs. Kennedy left the tea table at the White House upon her departure.

This photograph shows the elevator hall on the Second Floor during the John F. Kennedy administration. Like the nearby Center Hall and the East and West Sitting Halls, this space was redecorated by First Lady Jacqueline Kennedy. Interior designer Sister Parish envisioned the design concept for the space, while furniture was acquired under the guidance of Henry Francis Du Pont and arranged by interior designer Stéphane Boudin. Prominently featured on the wall here is an 18th-century mirror loaned to the White House by the Mount Vernon Ladies' Association.

This photograph is of floral arrangements in the Green Room was taken by Robert L. Knudsen on March 20, 1962. The Green and Red Rooms were decorated for a luncheon in honor of Sylvanus Olympio, President of Togo. The Green Room is located on the State Floor of the Executive Mansion. It was the first room named after the color of its textiles and has Federal style furnishings. The elegant but relaxed parlor is used for small gatherings, interviews, and teas.

This photograph of the Vermeil room before First Lady Jacqueline Kennedy's restoration project was taken by White House photographer Robert L. Knudsen on May 8, 1962. The Vermeil Room is located on the Ground Floor of the White House. In 1957, during the Dwight D. Eisenhower administration, Margaret Thompson Biddle bequeathed her collection of late 18th and early 19th-century vermeil, or gilded silver, to the White House. The Vermeil Room was named after Biddle's collection, which is on display on the room's shelves. The portraits of first ladies have traditionally hung from the room's walls.