Lotrščak Fort is considered as one of the best preserved city defense systems, and it was built during the 13th Century. Square shaped, with the proportions and structure of the walls of a Romanesque fortification it was eventually adapted to its function (at one time it was even a warehouse, and a coffee shop). It got its name in the mid-17th century when a bell 'Campana latrunculorum', or 'Bell of thieves' was placed in the inner section, which rang every evening before closing the gate. You can no longer hear the bell, but Grič cannon, every day at noon, firings to mark the middle of the day. For more than hundred and ten years, the cannon is shooting at noon in the memory of an event from Zagreb's past. According to the legend, Grič cannon fired a shot at noon on the Turkish camp, which was located across the Sava River, and blew the rooster on the chefs platter. After that the Turks have fled and did not attack Zagreb. At the top of the tower there is also a lookout with a beautiful view of the Upper Town of Zagreb and its surroundings.