Archeological museum
The Archaeological Museum of Rhodes is housed in the medieval building which served as the Hospital of the Knights of St. John. The structure was begun in 1440 by Grand Master de Lastic with money bequeathed by his predecessor, Fluvian, and was completed in 1489 by Grand Master d’Aubusson.
http://www.rodosisland.gr/en/see-do-rodos/Culture-&-Heritage/Museums-&-Art-Galleries-.asp