This lab is in a large converted storeroom in the front range of the inn. The hypocaust doesn't reach this far so the floor is packed earth but unlike the lab on the other side a fireplace has been installed that shares a chimney with the barracks in the converted stable on the other side of that wall.

Access to this lab is only from the outside of the Inn, via a dedicated passageway. It is the largest lab inside the Inn.

This lab has recently been used for teaching and has an observation gallery at one end and a throne at the other (Gallery, Greater Focus). There is also a large shuttered skylight in the ceiling allowing celestial observations (Lesser Feature).