From the 12th December 2007-25th January 2008 a watching brief undertaken on behalf of the Archaeological Superintendency of Rome (SSBAR) in the building situated in via del Lavatore n° 31 during work to assess the possibility of installing a lift. The investigations involved the entire space destined for this use (c. 17 m2) to a depth of about 3.00 m from ground level and it was possible to observe the transformations which hade occurred in this area from the 12th century until the modern era. The earliest walls identified were datable to the 12th-13th century and represented further evidence of the renewal of construction activity in this part of the city, following the semi-rural phase which had characterised the preceding centuries. A new building intervention was attested by levelling of the structures and raising of the floor level for the construction of a new palazzo between the end of the 15th-beginning of the 16ht century. Subsequent interventions linked to a substantial restructuring, which gave the palazzo its present appearance, did not however lead toa further rasing of the floor level.