St. Mark's Cathedral is almost 1,000 years old. It is one of the most rich and important churches in Catholicism. It has more than 500 stone pillars and more than 4,000 square meters of mosaic paintings. On the one hand, it combines Byzantine and Gothic styles, on the other hand, it also has an Oriental style, open to Oriental culture. This is the charm of the temple. The Church of St. Mark stands on the square of St. Mark in the city center. It was built in memory of the 12 saints and a collection of loot, built in the 9th century AD and completed in 1094.