2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/114318We construct a nonuniform lattice and an infinite family of uniform lattices in the automorphism group of a hyperbolic building with all links a fixed finite building of rank 2 associated to a Chevalley group. We use complexes of groups and basic facts about spherical buildings.4 pages, 3 figuresGroup Theorytext