Complex sentence: From this square terrace a cylindrical bell tower rises to a height of 12.5 metres (40feet), made of sixteen red granite columns supporting a monumental statue of the Virgin Mary, 11.2 metres (36 feet) tall.
Split into simpler sentences: From this square terrace a cylindrical bell tower rises to a height of 12.5 metres (40 feet). This is made of sixteen red granite columns that support a monumental statue of the Virgin Mary, 11.2 metres (36 feet) tall.