Please answer the following question: St. Mark's Historic District is a historic district located in the East Village neighborhood of Manhattan New York City. The district was designated a city landmark by the New York City Landmarks Preservation Commission in 1969 and it was extended in 1984 to include two more buildings on East 10th Street. It was listed on the National Register of Historic Places in 1974 and was expanded in 1985. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Building