The aim of this paper is to present first results of a dissertation project that investigates the transition from Greek to Roman architectural models and culture in Hellenistic Sicily, using the example of bathing facilities in Taormina, Tindari, and Solunto (from βαλανεῖα to thermae). This paper focuses on the early phases of the “Piccole Terme” at Solunto. After a brief introduction to the topography of Solunto and the urban and cultural significance of baths, documentation methods of the project as well as the development and function of the Piccole Terme are discussed. Four phases can be distinguished: built in the 2nd c. B.C. as a Greek βαλανεῖον, the Piccole Terme were first remodeled at the end of the 1st c. B.C. and finally converted into a Roman-type bath building during the 1st c. A. D., remaining in use at least until the 3rd c. A. D. Furthermore, problems of water management and heating technology are assessed, based on the discovery of hitherto unknown features (tank) and archaeometric analysis (hypocaust system).