Location: Rome, Italy
Owner: Istituto Nazionale di Astrofisica
Until recent times Monte Mario was one of the three sites of the Osservatorio Astronomico di Roma. Now it hosts the Instituto Nazionale di Astrofisica (INAF) headquarters, with the presidency and central administrative offices of the institute.
The Monte Mario site includes the beautiful Villa Mellini (XV century) with the Museo Copernicano, the solar tower, and the turret of the Rome meridian, the first Italian meridian.