Founded thousand of years ago, Sofia is the capital and the largest city of Bulgaria. Sofia is a home for Bulgaria’s most prestigious and largest educational institutions, colleges, and middle schools. It is often become a preferred destination for international congresses and there are a great many halls and centers. The city\'s history spans 2,400 years. The city is very concerned about the preservation of historical monuments. A visit to Sofia can be a good opportunity to learn more about the history of the city.