Belgrade is the capital and largest city of Serbia, with a population of over 1.2 million people. It is located in the north-central part of the country and is the administrative center of the Central Serbia region. Nis is the third largest city in Serbia, located in the south-east of the country. It has a population of around 250, 000 people and is an important industrial and cultural center. Nish is a city in the south-west of Serbia, with a population of around 80, 000 people. It is known for its historical monuments and is an important cultural and educational center.