More pictures 17 feet 11 inches

Here is a picture of the top of the tower and one of me standing on the top of a six foot ladder.

Based on the weights we measured during the inventory process, this tower weighs about 30.3 lbs. This translates into only 3.4 lbs per pillar (for the bottom set of pillars). It used about 13,000 bricks, about 3/4 of the inventory.