The Old Town in Đurđevac is the 1st category cultural monument, one of the best preserved low-lying fortresses in the north of Croatia. It was once surrounded by swamps so it belongs to the so-called Wasserburg type of forts. It changed its owners and look over the centuries. The fortress was of a great importance during the Turkish period, especially after the fall of Virovitica in 1552, when it became the most protruding and closest place facing Turkish border, so ti continuously kept a garrison. Despite many Turkish attacks it was never seized and as they left, the fort gradually lost its defending importance. It remained under the Austrian power till 1873, and was annexed to the territory of Croatia in 1881.

Today the fortress is the local museum which houses more than 2000 works of visual arts and an ethnographic collection consisting of Croatian and foreign exhibits, all of them a donation from Ivan Lacković Croata, world known naive painter who was born in the vicinity. Every year during the last weekend in June there is an enactment carried out called 'The Legend of Picoks' (local term for 'cocks') that is based on historic facts: Turkish army wanted to conquer the town but the natives were wise and shot the last cock at the enemy. Ulama-beg and the whole Turkish army, convinced the townsmen had plenty of food left, fled the area and the local population was nicknamed 'picoki'.