The mosque of Mastabas, with the characteristic 9-dome architecture, is an authentic monument of Rethymnon and has been conceded to Goulandris Natural History Museum (GNHM) following a decision of the Ministry of Culture. After the completion of restoration and of the relevant museological study, it started operating as a Museum of Palaeontology, being annex of Goulandris National History Museum in Crete.
The paleontological collection of the Municipality of Rethymnon, which is the basis of the exhibited material, has already been conceded to GNHM. It has been studied and conserved with the cooperation of the University of Athens. Original findings of endemic mammals in real-size representations and in anatomic arrangement shall accompany the exhibition. Visitors shall get to know the dwarf Cretan elephants, dwarf hippopotamuses and polymorphous Cretan deers, and they will find information on these animals, the first inhabitants of Crete, and on Greek mythology.
In the properly landscaped garden of 250 sqm, trees and plants that thrive in Crete have been planted, such as plane trees, orange trees, olives, carob trees, Cretan palm trees, oleanders and laurels, as well as shrubs such as wild roses, lavender, dittany, rosemary, etc.
The Palaeontological Museum of Rethymno currently hosts a variety of events, guided tours, educational programs and activities for students, as well as special tours for Greek and foreign visitors.