Lotrščak Tower is a 13th-century fortification on Strossmayer Promenade in Zagreb’s Upper Town. Built to guard Gradec’s southern gate, it now draws visitors for its Grič cannon, fired at noon, and the city views from its upper deck. Climb the narrow staircase to look across the red-tiled roofs of Upper and Lower Town and toward the surrounding hills. Inside, the tower also has gallery rooms with occasional contemporary art exhibitions, adding another stop on a walk through the historic district.
A tower built to guard Gradec
Lotrščak Tower stands on Strossmayer Promenade in Zagreb’s Upper Town, in the former town of Gradec. Built in the 13th century, it guarded the southern gate in the town wall. The gate itself was later removed, but the tower remains a visible part of the old defensive system.
Its name is linked to the bell that sounded before the town gates closed for the night. The warning told people outside the walls to return before they were shut out until morning. The tower’s role changed over time: in the 19th century, it gained another floor and windows, and a cannon was placed on its roof.
The Grič cannon at noon
The cannon fired from Lotrščak Tower is known as the Grič cannon. Its daily noon shot has marked midday since 1877. The tradition is also associated with helping church bell-ringers across Zagreb synchronize their bells.
If you plan to be nearby for the firing, arrive before noon and be ready for a sharp, loud report. The sound can be startling if you are close to the tower, so people sensitive to loud noises may prefer to watch from farther away. The cannon is part of the tower’s history, but the firing is also a present-day feature of an Upper Town visit.
Climbing up for the view
Inside, the tower has several gallery rooms, where contemporary art exhibitions are held occasionally. A narrow staircase leads through the building toward the observation deck. The climb is part of the visit, so allow time to go at a comfortable pace; the steps may be difficult for anyone with serious mobility limitations.
From the top, the view takes in Zagreb’s Upper and Lower Town, with red roofs, churches and the wider city stretching toward the surrounding hills and mountains. The deck gives you a chance to pick out the contrast between the historic centre below and the newer parts of the city beyond it. Allow around 15 to 20 minutes for a short visit, longer if you want time for the gallery rooms and photographs.
Häufige Fragen
When does the cannon fire at Lotrščak Tower?
The Grič cannon is fired daily at noon. Arrive a little early if you want to watch from nearby, and be prepared for a loud sound.
Can you go inside Lotrščak Tower?
Yes. You can climb to the observation deck and visit the gallery rooms, which host contemporary art exhibitions occasionally.
How long do you need at Lotrščak Tower?
Allow about 15 to 20 minutes for a short visit, including the climb and time at the viewpoint.
Is Lotrščak Tower open on Mondays?
No. The tower is closed on Mondays.
