On the 17th and 18th of September, several spaces in the old part of Lisbon open their doors for the first time, as part of the “Open House Archeology”, organized by the Lisbon Museum. Private homes, shops, hotels and museums show, in a single weekend, what very few people know about the archaeological and historical past of the city of Lisbon. Participation is free upon prior registration at: reservas@museudelisboa.pt or by calling 215 818 530. The complete program is available on the Museum of Lisbon website.