St. John's Fortress, Šibenik

Ivana) is an early modern fortress in Šibenik, Croatia, situated atop a hill north of the city's historical center.

[3] In the spring of 1646, a Genoese engineer in the Venetian service, Father Antonio Leni, designed a simple symmetric fort with its front hornwork elongated towards the enemy and two flanking demi-bastions on the side towards the city.

As the most modern, strongest and highest fortification, St. John's Fortress assumed the central role of Šibenik defence.

The basic form and structures of the fortress have remained intact until today, as is witnessed by numerous graphic depictions throughout the last three centuries.

[9] Venetian, Austrian and Yugoslav military forces have occupied the fortress and left their mark in small-scale interventions on various facilities, depending on their needs.