Ride the Lightning

Climb from the flat roof up the downward facing slats and then mantle over the lip. Either rap or down climb to escape.

As soon as you stand up off the ground, you're visible, so make it quick!

Begin on any portion of the circular portion of the building. Finish at the lightning rod, ideally with the intention of leaving a knight behind.

A pad would protect the fall, but it's better not to fall.