According to various sources, it seems that this was the first residence of the Leti family who arrived in Spoleto in 1500 but the family name became extinct at the beginning of the XIX century.  Due to a lack of male heirs. The Residence was built shortly after the medieval city walls were constructed (1292) using, in part, a pre existent Roman structure which you can still see walking along Via delle Felici.Over the centuries the building was under construction many times and in the XV and XVI century. It became an aristocratic style of building. It is during these years that the groin vaults which you can see on the ground floor and the current architectural details were built. In the XVII and XVIII century. The small building was enlarged thanks to the construction of the north wing and the beautiful garden that includes the two neoclassic facades. In these two facades we can still admire the architectural features of that time such as, pilaster strips, trabeations, bases and capitals that give balance to the architectural whole. In the northern wing of the garden there is also a very important fountain with a nymphaeum.