Antigua Clínica del Doctor Lozano, Historical medical building on Paseo Sagasta, Zaragoza, Spain

Antigua Clínica del Doctor Lozano is a detached early-20th-century building at the corner of Paseo Sagasta 22 and Calle Mariano de Lagasca, designed by Félix Navarro in 1903. Its main rectangular block runs parallel to Lagasca, with a central body flanked by two terraced porches facing the paseo and a rear garden wing. On the garden side, two projecting semicylindrical volumes housed the operating room and the chapel. A 1916 extension by Manuel del Busto closed the corner with projecting bay windows, breaking the original axial symmetry. The white facades combine classical composition with eclectic ornament alluding to medicine and the owner.

Félix Navarro designed the building in 1903 for the Aragonese doctor Ricardo Lozano Monzón, combining his family home with a clinic. Manuel del Busto extended it in 1916, closing the corner with projecting bay windows. The Sanatorio Lozano stayed open until 1977, and from 1934 it was run by Lozano's son Ricardo Lozano Blesa. It was listed as a Bien Catalogado of Aragonese heritage in 2009.

The building's ornamentation is eclectic, with historicist and symbolic motifs that allude to its medical use and to its owner, the doctor Ricardo Lozano Monzón. The white facades unify the main body, the porches with terraces and the 1916 corner addition by Manuel del Busto. The Sanatorio Lozano remained in medical use until 1977.

The location sits at a major street corner in the city center and is easy to reach on foot. Since this is a protected heritage building, visitors can view the exterior facades from the street, though the interior is typically not open to the public.

The two semicircular volumes on the rear garden front housed the operating room and the chapel, placed side by side on the same axis. The clinic stayed open until 1977, and from 1934 it was run by the founder's son, surgeon Ricardo Lozano Blesa. The building was listed as Bien Catalogado in 2009.