The development of interwar villa architecture in Poznan was inseparably connected with the process of emergence of new elites. One of the most important architects who designed houses for this group of customers was Marian Pospieszalski. Villas designed by him were built in the residential districts of the city such as Grunwald, Debiec and Solacz as well as in the vicinity of Poznań in Strzeszyn and Puszyczykówko. Three of the houses are especially characteristic architectonically and were designed for the archeologist Józef Kostrzewski (1930), the painter Stanisław Smogulecki (1932) and the attorney Roman Sioda (1938), respectively. In those realizations M. Pospieszalski skillfully combined modern solutions with references to the past, thereby meeting the expectations of his customers. The designs were on the one hand a manifestation of the architect's esthetic views which he expounded in his surviving notes of 1951, while on the other hand showed affinity to the German architecture of the first decades of the 20th century. The villas designed by M. Pospieszalski are still in good condition today, but have undergone major reconstruction.