Tondo, Circular footbridge in Freedom Quarter, Brussels, Belgium.

The Tondo is a circular footbridge linking two parliamentary buildings across the Rue de Louvain in Brussels. Its thick ring of dark brown panels is lined on the inner rim with reflective silver-toned metal, and the open centre frames the pale stone facade and grey roof of the building behind. A black street lamp stands at the lower left against the surrounding brick architecture.

The Tondo links the buildings of the Chamber of Representatives and the Senate across the Rue de Louvain, in the block between the Place du Trône and the Rue de la Loi. It was designed by OFFICE Kersten Geers David Van Severen and completed in 2020, with the official opening in January 2021. The ring spans the street between the two parliamentary complexes.

The name refers to the tondo, a circular painting format used in Renaissance Florence, such as Michelangelo's Doni Tondo. The architects adopted the round plan for this link between the parliamentary buildings, so the crossing itself follows a closed curve rather than a straight span.

The bridge is easy to cross, with a gentle slope of 4% handling the height difference and ensuring accessibility for everyone. This minimal incline makes the crossing comfortable for visitors of all ages and mobility levels.

The floor hangs from the roof structure, creating a weightless appearance while minimizing visual bulk. This suspension system also provides shelter from the elements while maintaining open sightlines in every direction.