Question: 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. District School No. 9 -  District School No. 9 sometimes referred to as the Old Stone Schoolhouse is located on NY 17A 1.4 mile (2.3 km) south of Goshen New York. One of the first schools in the county it remained in use for well over a century possibly two.Its year of construction is not known.
Answer:
Building