The Senior Magi live in a two range house (think like the ones with the 
shops in on Bridge Street north of the river) between St Clement's and 
the King's Ditch (a little north of where the Maypole is now).  The 
ground floor of the front range has shops -- a large bakery that shares
the house's kitchens, a shop of scribing supplies, and an importer (a
front for House Mercere).  The "ground" floor is actually slightly raised
to keep it from flooding and there is a vaulted storage area underneath,
about half underground, which floods during the winter.

The rear range has the kitchens, sculleries, and so on on the ground floor.
The town end of the first floor has a two-storey hall barely large enough to
be a hermetic labratory lit by south facing windows over the courtyard and
skylights in the roof.  The rest of the volume in both ranges is used for
sleeping rooms, and the three senior magi each have rooms on the south side
for the best lighting when reading.

The courtyard is about as deep again as the building, and has street access
via an alleyway that is barely wide enough to drive a wagon down.

About two dozen of the covenfolk live here as well as the magi.

The base aura is Divine 3.