Delos remained unknown to West Europe until the Renaissance. And archaeological interest in the island only started in 1872 when Greek and French researchers began digging around. When Greece became independent, one of the first services formed was the Greek Archaeological Institute. Together with the French School in Athens, they started doing systematic excavations that continue to this day. Between 1902 and 1914, the sanctuary of Apollo was brought to light together with a large part of the Hellenistic town. In 1960, mosaic floors and painted wall plaster were discovered.