The collection is composed of some 121 unpublished manuscript documents - in Latin and Italian - relating to the Papal States and the House of Ferretti. The collection also contains many supporting photocopied items (articles etc), and some colour photographs of Palazzo Ferretti in Ancona. There is a large envelope containing city plans of Ancona.
This material offers a detailed account of the private lives of the minor nobles in the Papal States after the Sack of Rome in 1527 and the closure of the Council of Trent in 1563.