2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199505We review the construction of the universal Hamilton-Jacobi counterterm for dilaton gravity in two dimensions, derive the corresponding result in the Cartan formulation and elaborate further upon black hole thermodynamics and semi-classical corrections. Applications include spherically symmetric black holes in arbitrary dimensions with Minkowski- or AdS-asymptotics, the BTZ black hole and black holes in two-dimensional string theory.9 pages, proceedings contribution to QFEXT07 submitted to IJMPA, v2: added RefHigh Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext