Oud gerechtsgebouw Antwerpen, 19th-century courthouse in Antwerp, Belgium.

The Oud Gerechtsgebouw Antwerpen is a courthouse on the Britselei, built from 1871 to 1874 in an eclectic style. Grey stone and reddish brick band the facades, and rows of rectangular windows run across a long lower wing and a taller central block. That block rises to a steep dark grey mansard roof, with a balustraded stone gallery and arched windows below it; small turret-like stone elements project above the rooflines of the left wing.

The building was constructed between 1871 and 1874 by architects Louis and Frans Baeckelmans and shows design influences from the Paris Louvre. Its architecture reflects Antwerp's confidence as a wealthy trading city that wanted to express its institutions monumentally.

The courtroom features a green silk ceiling and wooden panels decorated with classical motifs about justice and law. Through this ornate interior, the building expresses how seriously the city took its judicial role.

The building stands at the corner of the Britselei, a short walk from the Scheldt quays and the city centre. It reopened on 12 June 2023 after renovation works that cost more than 56 million euros. The courtrooms and offices are reached from the Britselei side, while separate entrances and waiting rooms were created for victims and a pavilion for detainees.

The facade combines various architectural styles into an eclectic whole that includes both European Renaissance and classical elements. This mixture makes the building a valuable example of the architectural language of its era.