evidence: Medieval Bosnian country was for the first time mentioned in 958 in De administrando imperio written by the byzantine emperor Constantine Porphyrogenitus as a small country in the today’s central-eastern Bosnia. The most powerful rulers or "ban" were ban Kulin and Stefan II Kotromanić who expanded Bosnia to the territory of today’s Herzegovina. The first crowned ruler and establisher of the Bosnian kingdom was Tvrtko I Kotromanić who expanded Bosnia during the 14th century also to some parts of today’s Dalmatia and Montenegro. The last Bosnian king Stjepan I Tomašević was executed in 1463 by Ottomans and that was the end of Bosnian kingdom. [...] In February 1984, Sarajevo was a city of friendship without frontiers, city of peace and city of international recognition without prejudice. The second important fact about Sarajevo Olympic Games was that for the first time since Schamonie 1924 one small county became the host of Winter Olympic Games. Up to that time this was a privilege reserved for the richest countries of the world. [...] Sarajevo was the first city in Europe and the second city in the world to have a full-time operational electric tram network running through the city, the first being San Francisco. Also, Lonely Planet has named Sarajevo as the 43rd best city in the world, and in December 2009 listed Sarajevo as one of the top ten cities to visit in 2010.