What is UNESCO? UNESCO stands for United Nations Educational, Scientific and Cultural Organization which is a branch of the United Nations designed to protect culture, science and education. One of the ways UNESCO does this is by assigning sights and destinations with special cultural, historical or physical qualities like the Venetian Lagoon, Ancient Rome and The Last Supper in Milan. The list of UNESCO World Heritage Sites is created and maintained by the members of the program of UNESCO's World Heritage Committee. The sights gain international attention for preservation and safeguarding- in other words these are sights that the UN deems to have timeless importance in international and intercultural relations.Italy as a country has the largest number of UNESCO heritage sights in the world and coincidentally are some of the most sought out destinations for tourists from around the world. Some of the top UNESCO sites to visit in Italy include:1. The Last Supper by Leonardo Da VinciOn display at the Pinacoteca in Brera (Milan) quite arguably one of the best museums in Italy, the masterpiece by Da Vinci represents the scene of The Last Supper of Jesus with his disciples. According the scene portrayed in the bible, Leonardo in this painting has depicted the dismay that occurred among the Twelve Disciples when Jesus announced that one of them would betray him.Visiting Milan and want to visit The Last Supper? This is one of the stops on our Best of Milan tour and we highly recommend you book with us. Getting tickets to the museum is like a poker game. We are pros at getting tickets and can organize your tour in Milan with an expert art guide.2. Villa Adriana TivoliThis is an ancient Roman villa built by emperor Hadrian in 2nd century AD and is considered to have special physical significance by UNESCO for having its architecture influenced by Greek, Roman and Ancient Egyptian elements. The villa is full of remains, fountains and botanical gardens. A must visit for ancient history buffs. From Rome, the villa can be easily reached by taxi, train or the metro underground. Let us know if you would like more information about visiting Villa Hadrian.3. The Historical center of FlorenceHistorical centers in Italy in the major cities like Rome, Siena and Florence are apart of the UNESCO heritage list of sites and for good reason. All of these centers are filled with a large number of rich historical statues, monuments, museums which house centuries old masterpieces, architectures, etc. Florence has a tiny historical center but is home to a wide array of precious sights like the Ponte Vecchio, the Uffizi museum (holds pieces from the world's greatest artists like Michelangelo, Botticelli, Leonardo da Vinci and Raphael) and the iconic Florentine Brunelleschi Duomo. Our guided tour of Florence covers everything you ever wanted to see or know about this renaissance UNESCO heritage gem.