Plas Uchaf (English: Upper Hall) is a 15th-century cruck-and-aisle-truss hall house 1.5 miles (2.4 km) south-west of Corwen Denbighshire Wales and 1 mile (1.6 km) north of Cynwyd. Its excellent workmanship indicates a house originally of considerable importance; it has been described as of palatial significance. 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