Kladovo (, ; or ) is a town and municipality located in the Bor District of eastern Serbia. It is situated on the right bank of the Danube river. The population of the town is 8,913, while the population of the municipality is 20,635 (2011 census). Name In Serbian, the town is known as Kladovo (Кладово), in Romanian Cladova, in German as Kladowo or Kladovo and in Latin and Romanised Greek as Zanes. In the time of the Roman Empire, the name of the town was Zanes while the fortifications was known as Diana and Pontes (from Greek "sea" -pontos, or Roman "bridge" - pontem). Emperor Trajan had a number of fortications constructed in the area during the Roman times, such as the well-known Trajan's Bridge (Pontes was built on the Serbian side, Theodora was built on the Romanian side). Later, Slavs founded a settlement that was named Novi Grad (Нови Град), while Ottomans built a fortress here and called it Fethülislam. The present-day name of Kladovo is first recorded in 1596 in an Austrian military document. There are several theories about the origin of the current name of the town: According to one theory (Ranka Kuic), name of the town derived from Celtic word "kladiff" meaning "cemetery" in English. According to another theory (Ranko Jakovljevic), the name derived from the word "klad" (a device used to hold a person shackled). A third theory has it that the name derives from the Slavic word "kladenac" meaning "a well" in English or from the Slavic word "klada" meaning "(tree) stump". There is also a theory that the name goes back to the Bulgarian duke Glad, who ruled over this region in the 9th century. There is a settlement with the same name in Russia near Moscow and it is believed that this settlement was founded by Serbs who moved there from Serbian Kladovo in the 18th century. One of the suburbs of Berlin also has this name, which originates from the Slavic Lusatian Serbs (Sorbs) who live in eastern Germany. The name is also found in the Arad and Timiș counties of Romania, Cladova, in Arad county Cladova, Arad, Cladova in Timiș county Cladova, Timiș Geography East of the town are the sandy region of Kladovski Peščar, black locust forests, and a marshy area called Kladovski Rit, which used to be a large fish pond. It is home to 140 species