I visited Jerusalem many times. It is a beautiful city. For the culture there is very different from those I am more familiar with. It is the Middle East! The in-between Western and the East. There are a lot of historical monuments, But I do have some reservation where they are truly historic, or recently made just to stand as a reminder to the history of the events in the long-gone past.
The old city wall is definitely historic. Built in the 16th century, almost 500 years old till now.