Petrova Gora is a mountain range in central Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

. The mountain used to be named Gvozd (Croatian

Croatian language

Croatian is the collective name for the standard language and dialects spoken by Croats, principally in Croatia, Bosnia and Herzegovina, the Serbian province of Vojvodina and other neighbouring countries...

 for 'forest'), but was renamed after 1097 to honour Petar Svačić

Petar Svacic

Petar Svačić was the last king of Croatia. It is assumed that he began as a ban serving under king Demetrius Zvonimir of Croatia and was then elected king by the Croatian feudal lords in 1093. Petar's seat of power was based in Knin. His rule was marked by a struggle for control of the country...

, the last native king of Croatia who died on the mountain in a battle against

Battle of Gvozd Mountain

The Battle of Gvozd Mountain took place in the year 1097 and was fought on Petrova gora in central Croatia, between the army of Croatian king Petar Svačić and King Coloman I of Hungary...

 Coloman of Hungary.

During World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, Petrova Gora was the location of the communist Partisan's central military hospital which consisted of a system of underground chambers and log cabins scattered throughout the mountain range. The hospital was never discovered by any of the armed forces of the Axis powers

Axis Powers

The Axis powers , also known as the Axis alliance, Axis nations, Axis countries, or just the Axis, was an alignment of great powers during the mid-20th century that fought World War II against the Allies. It began in 1936 with treaties of friendship between Germany and Italy and between Germany and...

 and remained in operation until May 1945. Starting in 1940, the League of Communists of Yugoslavia

League of Communists of Yugoslavia

League of Communists of Yugoslavia , before 1952 the Communist Party of Yugoslavia League of Communists of Yugoslavia (Serbo-Croatian: Savez komunista Jugoslavije/Савез комуниста Југославије, Slovene: Zveza komunistov Jugoslavije, Macedonian: Сојуз на комунистите на Југославија, Sojuz na...

, from makeshift underground printing rooms on the mountain, started printing Vjesnik

Vjesnik

Vjesnik is a Croatian daily newspaper, published in Zagreb. Through its history, it has been considered a newspaper of record.The paper was originally printed as a monthly publication by the League of Communists of Croatia starting in 1940...

, a daily newspaper that is still being printed daily in Croatia.