San Sebastiano in Vallepiatta is an ancient church found next to piazzeta della Selva in Siena Italy.The construction of the building began in 1493 under the patronage of the guild of weavers (Tessitori). Built in the shape of a Greek cross it has a cupola with a cylindrical tambor. The design is attributed to Francesco di Giorgio Martini. Most of the brick facade has only a sliver of a cornice with architrave in travertine marble added in 1545-1550. 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