Answer the following question: St Caian's Church Tregaian -  St Caian's Church Tregaian (sometimes referred to St Caean's Church Tregaean) is a small medieval church dating from the 14th century in Anglesey north Wales. It is dedicated to St Caian a Christian from the 5th or 6th century about whom little is known. The building contains a late 14th-century east window and a late 15th-century doorway. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Answer:
Building