Ogulin () is a town in north-western Croatia, in Karlovac County. It has a population of 7,389 (2021) (it was 8,216 in 2011), and a total municipal population of 12,251 (2021). Ogulin is known for its historic stone castle, known as Kula, and the nearby mountain of Klek. Toponymy There are several proposed etymologies for the name of Ogulin. Firstly that the surrounding woods needed to be cleared for a better defence of the town, so Ogulin received its name because of the resulting bare area ("ogolio" in Croatian) around it. There were a lot of lime-trees along the road from Ogulin towards Oštarije, and the people used to peel the bark, in order to get bass. It is suggested that Ogulin got its name from the verb to peel ("guliti" in Croatian). Neither proposal is historically confirmed. History Ogulin's history dates back to the fifteenth century, when it struggled against the Ottoman Turks. The exact timing of the building of the Ogulin tower has not been established. However, a document issued by Bernardin Frankopan in his town of Modruš at around 1500 AD marked off the boundaries of new castle between Modruš and Vitunj, and this is, at the same time, the first historical mention of Ogulin. Ogulin is known for the legend of Đula (also Zuleika or Zula) who threw herself into the abyss of the River Dobra because of an unhappy love affair. In the sixteenth century, it became a military stronghold against the Ottomans. For a brief time, between 1809 and 1813, Ogulin was a part of the Illyrian Provinces. Until 1918, Ogulin was part of the Austrian monarchy (Kingdom of Croatia-Slavonia, Modruš-Rijeka County, after the compromise of 1867), in the Croatian Military Frontier. It was administered by the Oguliner Grenz-Infanterie-Regiment N°III before 1881. Geography The town of Ogulin is situated in the very centre of mainland Croatia, between Zagreb and Rijeka. It was founded in a large valley formed by two rivers: the Dobra and Zagorska Mrežnica. The administrative constitution of the town of Ogulin covers the area of 543.32 km2, and has about 14,000 inhabitants according to 2011 census. This is a kind of transitional micro-region neighbouring the larger regions of Croatia - Gorski Kotar, Lika, Kordun and Gornje Pokuplje. The Ogulin-Modruš valley is the northern section of the Ogulin-Plaški valley, which finishes towards the south where the Modruš hills pass into the second