Requisitioned Dionysias House (Location)
The developers sure have found a lot of synonyms for 'take over by the military.' In this case, a residence among the fields of Faiyum.
The two treasures can both be pinpointed in the north side of the house.
As you might expect, the winning ninja strategy is to approach from the south and take out the guards unawares.
The treasures are both in red chests, one each on the first and second floor (or ground floor and first floor, if you'd rather). Looting both completes the location.
The requisition order inside is also somewhat enlightening.
