This is an impressive cathedral that was constructed in the 12th century and is important from both an historical and architectural view. The cathedral's twin towers serve as the most recognized landmark in Zurich. While the exterior is quite impressive, it is rather bare inside because of the thinking at the time of its construction that opulence was rather unholy. Some have said that this gives the church a bit of an eerie feeling. The church is packed with history including the fact that it was built on a site dedicated to some martyrs. The church is known as Gross Munster by the locals, which some English speakers have dubbed as Gross Monster.