from Wikipedia Zagreb:
Zagreb (pronounced /ˈzɑːgrɛb/) is the capital and the largest city of Croatia. Zagreb is the cultural, scientific, economic and governmental center of the Republic of Croatia in the Prigorje region. The city's population in 2006 was 784,900 (approx. 1.1 million in the metropolitan area). It is situated between the southern slopes of the Medvednica mountain and both northern and southern bank of the Sava river at an elevation of approximately 122 m above sea level.
Its favorable geographic position in the southwestern part of the Pannonian Basin, which extends to the Alpine, Dinaric, Adriatic and Pannonic regions, provides an excellent connection for traffic between Central Europe and the Adriatic Sea.
The transport connections, concentration of industry, scientific and research institutions and industrial tradition underlie its leading economic position in Croatia. Zagreb is the seat of the central government, administrative bodies and almost all government ministries.