Wall of the latter occur the three famous megaliths, which gave the name Trilithon to the Jupiter temple in Byzantine times.
31 shows the state of Stonehenge at the moment preceding the fall of the trilithon on the 31st of December 1908.
The fall of trilithon 22 and its lintel opened a larger path to the wind, and added to the danger of further destruction.
The societies advised that trilithon 6, 7, with lintel - which had slewed round - and trilithon 56, which was leaning at a dangerous angle, should be examined with a view to replacement with as little excavation as possible; that the monolith and lintel 22 be replaced, and its companion sarsen (21) secured; and that trilithon 57, 58, should be re-erected in its place, which was exactly known.
On the 19th of September 1 9 01 trilithon 56 was successfully raised to a perpendicular position.