High atop Castle Hill, with a sweeping view of Esztergom, Hungary, is the world’s 8th largest church. The inside space is over 18,300 feet (almost equivalent to 3 1/2 miles). It also has a long name: Primatial Basilica of the Blessed Virgin Mary Assumed into Heaven and St. Adalbert. Plus, it has the record for the largest painting on a single canvas (44 x 33 feet). Built on the ruins of previous churches that date back to 1010, this Catholic Basilica was finished in 1856.
