“Bo” died Aug. 1, 2012, in Towson, Md.

His early schooling was at Gilman in Baltimore and at Hotchkiss. At Princeton, where his father was in the Class of 1919, he lettered in lacrosse, belonged to Ivy, and majored in architecture. After four years in the Marines, which included duty in Korea and attaining the rank of captain, he earned a master’s degree in architecture at Harvard.

In 1957 he returned to his hometown of Baltimore and worked as a city planner until establishing the first of three architectural firms. His projects included restoration of the Pimlico Race Course clubhouse and Babe Ruth’s birthplace, and the commission for Maryland’s pavilion at the New York World’s Fair in 1964.

Bo was an early pioneer in historical restoration and a leading advocate for the renewal of Baltimore’s Inner Harbor. He founded and led many preservation groups. A fellow architect described him as “a huge figure in the architectural history of Baltimore.”

Though Bo retired in 1985 after three years with the National Building Museum in Washington, he remained involved in historical architecture and even expanded his interest to French chateaus.

He was an avid canoeist and enjoyed summers at his Fishers Island, N.Y., home, which he designed.

Our sympathy goes to Ellie, his wife of 62 years; his six children; and 19 grandchildren.

Undergraduate Class of 1950