Sofia ( or or ; , "", ) is the capital and largest city of Bulgaria. 1.26 million people live in the city and 1.68 million people live in its metropolitan area. The city is at the foot of Vitosha Mountain in the western part of the country. Being in the centre of the Balkan peninsula, it is midway between the Black Sea and the Adriatic Sea, and closest to the Aegean Sea. 

Sofia has been an area of human habitation since at least 7000 BC. Being Bulgaria's primate city, Sofia is a hometown of many of the major local universities, cultural institutions and commercial companies. Sofia is one of the top 10 best places for start-up business in the world, especially in information technologies. Sofia is Europe's most affordable capital to visit . 

For the longest time the city possessed a Thracian name, derived from the tribe "Serdi", who were either of Thracian, Celtic, or mixed Thracian-Celtic origin. The Serdi and the name of emperor Marcus Ulpius Traianus (53 – 117 AD) prompted the Romans to give the city the combinative name of "Ulpia Serdica"; Ulpia is derived from an Umbrian cognate of the Latin word "lupus", meaning "wolf." It seems that the first written mention of "Serdica" was made during his reign and the last mention was in the 19th century in a Bulgarian text (Сардакіи, "Sardaki"). During the Romans "civitas Serdenisium" was mentioned the "brightest city of the Serdi" in official inscriptions. The city was major throughout the past ever since Antiquity, when Roman emperor Constantine the Great referred to it as "my Rome", and it nearly became his capital.
What is the capital of Bulgaria? Is it a small  city? How manyh people live in the city? And in the metro area? What mountain is it at the base of? How many seas is it near? which one is it closest to? What is one other sea nearby? and the other? how long have people been living there? does it have universities? How does it rank regarding start ups? in the country? What kind of name did it have? where did that name came from? who was the emperor? What name did the  Romans give to the city? What does  lupus mean? When was he last mention of the name? what did Constantine called it?
Sofia no 1.26 million 1.68 million Vitosha Mountain Three Aegean Sea Black Sea Adriatic Sea since at least 7000 BC yes one of the top 10 best places in the world Thracian from the tribe "Serdi" Constantine the Great Ulpia Serdica wolf 19th century my Rome