St. Catherine's monastery, Mount Sinai, Egypt. It was founded by Justinian I in the mid-6th century CE.
This image was first published on Flickr.
Original image by Marc!D. Uploaded by Mark Cartwright, published on 14 December 2017 under the following license: Creative Commons: Attribution-NonCommercial-NoDerivs. This licence only allows others to download this content and share it with others as long as the author is credited, but they can't change the content in any way or use it commercially.