Construction of the fort started in 1850, based on the plans of the Austrian military engineer, Lieutenant General Emmanuel Zitta, under the leadership of Field Marshal Haynau. They designed a fort that was 220 metres long, 60 metres wide and four metres thick, with stone walls ranging from 12 to 16 metres high and 60 modern cannons placed behind its portholes. Four years later, the Austrian army, whose cannons threateningly overlooked the city of Pest on the other side, was already able to enter its dungeons. The other parts of the fortification system were never completed, with the “last protective bastion” built around the town of Komárom. In spite of this, the Citadella was a symbol of tyranny and absolutism in the eyes of Hungarians until 1899, since that was the year when the military withdrew from its walls. Later on, the building was used for military purposes yet one more time: during the Second World War, when a three-storey anti-aircraft bunker was established inside it. Warehouses and facilities to care for the wounded were set up in its dungeons. The inside of the fort is currently not open to the public, however, its permanent outdoor exhibitions and the fantastic view attract tourists to this day. The Citadella should be among the first things you visit as part of a long walk when you are in Hungary. Head up winding Szirtes út and from a distance, you will spot the hilly area around the Citadella, where you can stop for a rest on the grass.