Novi Zrin

Novi Zrin (Hungarian: Új-Zrínyivár, Croatian: Novi Zrin, Latin: Novum Zrinium, Turkish: Yeni Zerinvar) was a fortress built by the Croatian Ban Nicholas VII Zrinski of the House of Zrinski and his brother Peter Zrinski near the confluence of the Mura and Drava rivers. Its construction started in 1661. The fortress was strategically important as it was designed to deter Ottoman incursions into Croatian and Hungarian territory.

Located near today's Donja Dubrava, Croatia, Novi Zrin served as a significant military outpost against the Ottoman Empire during the Austro-Turkish War (1663-1664). The fortress proved difficult for the Ottomans to capture due to its strategic location and strong defenses.

However, following the Peace of Vasvár in 1664, which was seen as unfavorable to Croatian and Hungarian interests as it recognized Ottoman gains, the fortress was ordered to be dismantled by the Habsburg monarchy as part of the treaty's stipulations. This decision generated considerable resentment among the Croatian and Hungarian nobility, contributing to later unrest and eventually the Zrínyi-Frankopan conspiracy. The demolition of Novi Zrin significantly weakened the defensive capabilities of the region against Ottoman attacks.