At two o'clock last Saturday afternoon, Kate Britton, daughter of Mr. and Mrs. Keith G. Britton of Washington, D.C. and King George, Va., became the bride of Robert Thomas Giamimo, son of Mr. and Mrs. Edward P. Giaimo of Manhattan and Pelham Manor, N.Y., in the Shrine of the Most Blessed Sacrament here in Washington. Fr. V. James Lockman celebrated the Nuptial Mass and a candlelight reception was held at Woodlawn Plantation, an historic 19th century estate on the Potomac, which was the gift of George Washington to his foster daughter at her marriage.

The bride wore an original creation of an 1860 ballgown of white imported Swiss organdy complemented by antique lace and garlands of lavender applique. The bridesmaids' dresses in matching shades of lavender repeated the rounded neckline, pointed waist, and full skirt of the bridal gown. The groomsmen, attired in formal cutaways and top hats, further reflectd the 19th century theme.

The bride, who will retain her maiden name, was graduated from the Immaculata Preparatory School of Washington, D.C., received her baccalaureate from Georgetown University and her master's in special eduation from George Washington University.

Mr. Giaimo was graduated from the Loyola School of Manhattan and received his degree in business administration from Georgetown University. He is president of Monolith Enterprises, Inc. which owns and operates the American Cafe restaurants.

The couple is taking a wedding trip to Italy.