At the start they tell you that there are no real antiquities in the museum. There are actually a couple. There is a baptismal font from the Byzantine era. And there are pieces of two columns from the second temple. Those two things, and the view from David's Tower, make it worth going. The museum displays tell the story of Jerusalem from the beginning. There is an archaeological dig in the middle of the site - you can see rounded balls that were used during sieges.