The Hypo Bank headquarters complex (Tavagnacco, North-Eastern Italy) is formed by two seven-storey tilted buildings structurally separated by a vertical seismic joint. The construction was subjected to a series of harmonic forced vibration tests in August 2005. The special structural typology of tilted building and the complex distribution of the resisting structural members have made interesting, and at the same time quite complicated, the interpretation of the real dynamic behavior of the construction. In this paper, dynamic measurements are used for the calibration of a numerical model of the whole complex.