Grand Pharos Lighthouse is the lighthouse in Seyda Neen. It is home to Thavere Vedrano. This building is used to lure ships to the port to welcome new travelers to Morrowind. The lighthouse has a set of stairs, random containers, and the actual lighthouse itself.
During the investigation Nerevarine will visit and question lighthouse resident Thavere Vedrano.
Trying to find out where Fargoth is hiding his valuables, Nerevarine will use the lighthouse as observing point.