Lassea was one of the ports of the Roman city Gortyn, the capital of Crete in the Roman Era, and is located at the site of the current settlement Chrysostomos. Lassea was rich in copper deposits, which were used for trading copper. Saint Paul mentions the town in his Acts for his stay on Crete.

On the west end of the beach of Chrisostomos, there is a “line” of rocks that heads towards the small islet Trafos. This is the old dock of the ancient town Lassea. The rocks were in that place since the 1960s when they were used for the construction of the Oil Tanks in Kali Limenes. On the island and on the beach, opposite Trafos, you can still see remains of the ancient town of Lasea. A bit further to the west, tombs have been identified.