Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Rock Ledge (Norwalk Connecticut) - Rock Ledge is a historic mansion in Norwalk Connecticut in the Rowayton section.It was built in 1911 featuring Tudor Revival and Jacobethan Revival architecture. Edward Moeller designed the structure. The mansion belonged to a U.S. Steel executive. The former Rock Ledge estate at 33 and 40-42 Highland Avenue was added to the National Register of Historic Places in 1977.
A:
Building