These basalt doors are found across Syria, but generally most frequently originate from the Syrian Limestone Massif around Aleppo and Idlib provinces. They are found throughout the Late Antique period and were a particular feature of tower-houses occupied by multiple families. In some cases these doors have remained in situ, thus enabling us to see how they would have been far easier to operate than the modern viewer would expect.
In this picture of the entrance to the monastery hand prints can be seen over the lintel. These were made by people making a vow to the saint and sacrificing an animal (goat or sheep) at the site and leaving a bloody handprint over the entrance to seal the prayer.