Starting from predicted yearly and daily distributions of the temperature fields induced by climatic actions over the cross-sections of the Leaning Tower of Pisa, the correlated time histories of thermal movements and eigenstresses have been calculated by simply assimilating the monument to a prismatic, inhomogeneous elastic body. Comparisons performed between calculated and measured daily and seasonal thermal displacements evidenced a good prediction capability of the model and its attitude to be used as an interpretation tool to understand also thermal periodical movements in other tower-shaped buildings.