Romanesque architecture developed between 1000-1150 AD and was inspired by Roman architecture. It used round arches, stone construction, and a basilica-style plan. Influences also came from other cultures. Romanesque architecture was characterized by thick walls, small windows, barrel or groin vaults, and decorative blind arches. It included churches with a nave, aisles, transept, and apse, as well as monasteries and castles. Stone, brick, and limestone were common building materials, with columns constructed of salvaged pieces or built up from stone drums.