Answer the following question: The Sauer Castle was the residence of Anton Sauer. Sauer had married his wife Francesca in Vienna Austria at age eighteen and a half. There they had their five children: Gustave O.L. Anthony Philip Jr. Julius J. Emil and Johanna.In 1858 they decided to move to New York City to be with Anton's mother and sisters that had already been there for some time. 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?
Answer:
Building