The limestones of Marmara Island in Turkey have been known since ancient times and have been widely used in architecture through the centuries. Three great civilizations, the Roman, Byzantine and Ottoman, all extensively used the marble from Marmara for all kinds of works- palaces, churches, mosques, statues, etc. The temple of Artemis in Ephesus was made of marble from Marmara. It has also been used in the Vatican. There is, in other words, a 2000 year history behind the stones of the island.

SOURCE: https://www.litosonline.com/en/article/dolomites-marmara-island-turkey