Archaeology
The higher part of the mountain, on the west, contains the ruins of some massive walls called Al-Kal'ah, and east of this are other ruins now called Kunaisah. However, potentially much more significant remains have been found on the northern side.
Like many other sites in the region, by the 20th century there was a large stone heap found on Mount Ebal; this one was known to locals as el Burnat (Arabic for the Hat), and was found by Adam Zertal, within a naturally shaped amphitheatre. Upon archaeological investigation, several potsherds were found among this heap, and were dated to 1220-1000BC, a date for which no other remains are found nearby, and so a more substantial archaeological excavation was launched at the site in 1987. The excavation found a large walled structure, seemingly built direct into the bedrock without a doorway or floor, and had been infilled by layers of stone, ash, and earth; on the southwest were found two paved areas split apart by a further wide wall higher at one end than the other and with a surrounding oval wall. Slowly burnt bones were found at the site, and after analysis were discovered to originate from bullocks, goats, and fallow deer. Notably, though they are Kosher, fallow deer are never specified as a sacrificial animal by the Bible.
Although the excavating archaeologist believed that the site was the compound containing Joshua's altar, the filled walled structure being the altar itself - the filling being a part of the altar rather than debris (and indicative of an Assyrian style altar, like that specified in the Book of Exodus as being hollow with boards) - and the wall between the two courtyards being a ramp (in accordance with the no steps instruction in Exodus), most other archaeologists believe it to be something else. The site has a significant issue in regard to the Biblical account of Joshua's altar, as it is located on the north side of the mountain, and not the south side facing Mount Gerizim, making a curse & blessing ritual held there and on Gerizim somewhat difficult to hold antiphonally; the excavating archaeologist proposed that this could be resolved by identifying a mountain to the north as Gerizim rather than the usual location, though the suggestion was ridiculed by both the Samaritans, who found it offensive to move the centre of their religion, and by other scholars and archaeologists.
Though some archaeologists agree with the consideration that the site was an altar compound (though not constructed by Joshua), and some (including Israel Finkelstein) at least agree that it was a cultic location (though not necessarily involving an altar), others believe that it was simply a farmhouse and/or the Biblical tower of Shechem. Those considering it to be a farmhouse and/or the tower of Shechem, argue that the paved areas are simply rooms, the sloping wall simply an eroded partition wall, and the infilled enclosure a room that was later changed into a tower - the foundation of the tower being the infill, and the rest of the tower now destroyed.
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