Stravon writes for the marvelous “Karistian Columns” that were monoliths. The quarrying activity was so intensive that in Marmari, the main export hub of Karistian marble, existed a temple for the worship of Marble Apollo. The intensive mining of marble occurred mainly during the Roman season. In the era of Julius Caeser (60-44 b.c) and Augustus, the Karistian Marble was in great demand in Rome, mainly for the manufacture of monolithic columns. It was also used in the facing of walls and floorings.
Up to this day we can admire monolithic columns of Karistian Marble in the library of Adrianos in Monastiraki Athens. The most remarkable monument of ancient quarrying can be found in Kylindroi Mylon. There are preserved, in the place where they were originally sculptured from the raw rock, gigantic monolithic columns of 12 meters length, the Kylindroi (Cylinders), as the locals call them.

The most interesting part of all is that there is probably a connection of the ancient quarries with the drakospita (dragon houses) of southern Evia. A theory exists, that the dragon houses were temples dedicated in the protector of quarry workers, Hercules. A military alarm, perhaps the threat of the fall of Roman Empire, the 3rd century A.D. had resulted to the withdrawal of the Roman guard and the pause of the quarries operation.