Covenant of the Immaculate Tower.
This is an urban covenant spread across several regios. I have always pictured this in Southern Italy along the crusader routes, or in Spain or Provencal near a pilgrimage site but any moderately prosperous town were prosperous strangers would not look out of place.
In a fairly ordinary town there is a fairly ordinary square. Surrounded on all four sides by multistorey buildings, various shopfronts occupy the ground floor. Standing in the middle of the square is an unremarkable belltower about fifty feet high. Local legend has one of the base stones as having come from the legendary Tower of Babel. The bells ring out every half hour from dawn to dusk.
The square has long since had a reputation for strange events. On holy days miracles have been known to happen and locals know better than to cross the square during evil nights.
These oddities do not stop a flourish market taking place, with local merchants, craftsmen and famers setting up stalls to cater to the town’s population, visiting nobles and a variety of pilgrims. It is a cheerful and prosperous market. The Magical Aura of 1 makes the colours are brighter, the weather always seems just a little better, the food tastes fresher.
The Covenant runs a tavern in one of the buildings facing the square. Other coven folk and craftsmen are scattered across the town in shops owned by the magi.
Visitors to the covenant know to enter the square by the northern entrance in summer/spring, and by the southern entrance in autumn/winter. They then must circle the edge of the square, just inside the row of surrounding buildings. If they reach the place they started as the bells in the tower are tolling they will find themselves in the next level of the regio.
Perhaps local know to mind their own business, perhaps they are distracted by the bells and the busy market, or perhaps it is a subtle effect of the magical aura, but people vanishing or reappearing in the square do not attract attention. On holy days when the divine aura rises to engulf the magic aura the regio is impassable.
The next Level has a magical aura of 3. The sudden quiet of the next level is a stark contrast to the bustle of the busy marketplace. The stalls and people are gone leaving only the bare flagstones of the square as well as the surrounding buildings. The bell tower is replaced by a white marble tower of seamless stone although the ringing of the bell can still be heard. Visiting magi will have no trouble recognising the Conjuring the Mystic Tower.
Basically it is a tower surrounded by a ring of buildings. Coven folk with supernatural virtues/flaws who do not feel comfortable in the mortal world live in the buildings as well as warriors and specialised craftsmen (glassblowers or illuminators). The Marble Tower contains the Covenant’s Council Chamber, Library and Laboratories of the junior magi.
The magical regio once extended only a few feet beyond the outer edge of the buildings however a number of decades ago a member of the covenant who was an expert in hermetic architecture extended the regio several miles in one direction. Now a grassy field provides grazing for horses and various animals.
Gaining the next higher regio again requires circling the courtyard, this time on the outside of the buildings. Travellers are warned that they must only travel in one direction without stopping, pausing or backtracking. Except for the section facing the field the walls of the buildings are only a few feet from the edge of the regio forcing people to travel in single file.
If the rules are followed, on completion of the circuit the white marble walls of the buildings now tower overhead. Following the edge of the building you come to a set of steps carved out of the marble. It Leads up around the edge of the tower, for that is what you now realise it is, a single massive tower, over two hundred feet wide and hundreds high.
Magical aura of 7. This level is the remains of a incredible conjuration spell. A single massive tower, partially ruined, long since abandoned. Several of the Covenant’s senior magi have their Laboratories here, either inside or on top of the Tower. They use the isolation to investigate the mystery of the Tower or perform their own arcane research.
The magi claim that there is a yet higher regio, one that contains a completed Tower, one so tall that it breaches the Lunar Sphere itself. Anyone with Second Sight or Visions or any other appropriate Virtue will occasionally gain a glimpse of a massive structure stretching up impossibly high.
It is unknown if anyone has ever discovered how to cross over. Certainly no one has returned to speak of what they have seen.
Once a magi claimed that the way to the highest level of the regio was via the top of the bell tower. He later vanished and was never seen again. No one has managed to repeat his feat. As it involves throwing yourself off the bell tower no one seems particularly keen to experiment.
The highest regio.
Magical aura of 9. This is a single wizards attempt to complete one of the Great Hermetic Projects. Stretching many thousands of feet high it is a marvel of engineering, artistic ability and magical skill. As construction progressed it became a battle ground for angels and demons. It is the echoes of these battles that cause the miracles and unholiness in the market place.
Except for a few being imprisoned by magical traps the Angel and demons have long since left leaving the pristine building to be infested by a variety of magical beasts.