The Daphne Monastery is built on a place which has been sacred since ancient times. Here was a Temple of Apollo. The name Daphne (meaning laurel) refers to Apollo. The temple was destroyed around 395 because it was outlawed by the Christian emperor. You can still see a surviving column of the temple near the entrance of the monastery.
Also here, Lord Elgin, who took quite some relicts of the Acropolois, took some relicts of the Temple of Apollo to England.
Source: John L. Tomkinson, 2002, AThens, The Suburbs. Greece Beyond the Guidebooks, Anagnosis, Athens.