Jacques Tits was a Belgian-born French mathematician who worked on group theory and incidence geometry. He introduced Tits buildings, the Tits alternative, the Tits group, and the Tits metric.

Uccle or Ukkel is one of the 19 municipalities of the Brussels-Capital Region, Belgium. Located in the southern part of the region, it is bordered by the City of Brussels, Forest, Ixelles, and Watermael-Boitsfort, as well as the Flemish municipalities of Drogenbos, Linkebeek and Sint-Genesius-Rode. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch).