Jerash is an ancient site, the earliest traces of human existence date from the 6th millennium BC. The most important sight for tourists though is a huge Roman city, most of it dating from after the middle of the 1st century AD.
In 2021 I put major sights into sub-galleries (bold names). Between those are pictures taken during the route I walked. Those pictures, if they have gps coordinates, can be seen on a map. For the other ones, first open a sub-gallery.