Built on the site of a Muslim mosque, this Catholic cathedral was founded by the Archbishop of Palermo in 1184. Additions were made through the centuries, so the magnificent church is now an assemblage of architectural styles, including Norman, Gothic, Neoclassical and Baroque designs. There are even remnants of its Muslim heritage: You'll see a column carved with a verse from the Qur'an at the cathedral's entrance. One TripAdvisor user who calls the Cattedrale di Palermo "wonderful" also recommends, "if you are in a hurry skip the Cathedral Treasury."

Keep in mind that the Palermo Cathedral (or Cattedrale di Palermo) is also known as the Santa Maria Assunta cathedral. You'll find it in the Quattro Canti, or at the center of the city's "Four Corners." Open daily with shortened hours on Sunday, the cathedral charges about €5 EUR (or about $7 USD) for entrance and another small fee for the treasury and crypt.