Jan Bagienski (1883–1967) – architect, professor at the Lviv Polytechnic, an outstanding representative of the Lviv architectural school. His creative heritage is contained in the implemented projects, pedagogical activity, scientific works and professional articles. A significant part of the creative heritage of Jan Bagienski belongs to the buildings intended for rest and regeneration. The article emphasizes that in his designs sanatoriums, hospitals and ambulances, the architect transforms the functional features of an architectural form into means of their artistic expression, and understands the natural, landscape and ethnic features of the region for which they are designed. The compositional layout in the field, the internal layout, functional compliance with the requirements for medical institutions, and the expression of the volumetric and spatial solution were examined.