Built by architect Joseph Poelaert between 1866 and 1883, it was in 1861 that Belgian Prime Minister Victor Tesh chose Joseph Poelaert to design the city's new courthouse. The end of the 19th century was marked by the need of rising nations to prove their power and superiority. From then on, everyone set about constructing buildings, each more impressive than the last. But the architecture of the 19th century is still marked by this building, which was the tallest in the world at the time! Measuring 116 metres high, it is even taller than the Atomium (102m).
For its time, it was an enormous undertaking, with a pharaonic budget of more than 50 million francs, representing the entire budget allocated to the work of the entire kingdom for one year, whereas the initial estimate was only 4 million francs. To this day, it remains a mystery why the architect was allowed to exceed the budget and the rules imposed for the construction of this colossal palace, often nicknamed "the mammoth" by local residents. It was inaugurated in 1883, even though the architect Poelaert was dead, he would not see his last work finished.