Rubbing and memory
Loose barlotiere lines are transferred on blackened linen. Missing petals are reconstructed from compass scars, glazing nail shadows, and asymmetric medieval corrections.
Stained glass atelier and conservation house
Rose windows restored by the hour of light.
Rosarium repairs medieval glass, maps lost tracery, and tests each lancet beneath a moving sun before a single quarry is cut. Our working model below casts the window onto the nave floor, where color must land with weight, direction, and mercy.
- 41
- active conservation rubbings
- 9.6m
- widest rose under scaffold
- 1327
- oldest pane in custody
Sext
white sun enters the crossing
Move over or focus the generator to reveal Rosarium's raking-light lead rubbing.
Conservation ledger
The atelier works like a quiet nave.
Each commission begins with mineral notes, soot readings, lead fatigue, and a floor study. Beauty is not approved until the repaired glass throws a believable climate across the stones below it.
Glass weather
Ruby flash is sampled at the abraded edge. Cobalt is weighed for manganese bloom. Amber panes are held against clerestory dust to keep new light from sounding too young.
Lead and mercy
Every new came is shaped with a softer inside shoulder so ancient glass can rest without being forced flat. The repair must disappear, but never lie.
Three windows under oath
Commissioned roses with provenance, weather, and rumor intact.
Rouen, north transept
The Rose of Saint Ouen
Thirty-two cracked ruby petals, two 1874 cobalt intrusions, and a missing amber oculus rebuilt from a sacristy photograph found behind a plaster station of the cross.
- Diameter
- 8.4m
- Lead loss
- 18%
- Return
- Michaelmas 2027
Elias Abbey, west face
The Abbot's Green Wheel
Emerald quarry glass, river-sand corrosion, and a bowed armature that makes the evening pool drift four feet south of the centerline during Vespers.
- Diameter
- 6.9m
- Panes
- 412
- Return
- Lent 2028
Arles, chapel of sailors
The Compass Rose of Saint Clair
Amber saints, cobalt nets, and three nineteenth-century repairs left visible at the patron's request. Salt haze is sealed with reversible isinglass and patience.
- Diameter
- 5.7m
- Fragments
- 96
- Return
- Advent 2026
Material office
A color is accepted only when its shadow behaves.
Our studio keeps two ledgers for each pane: one for the glass itself, and one for the light it sends away. The second ledger is the harder one.
Today's bench notes
- Ruby: copper flash thinned to two breaths at the saint's cheek.
- Cobalt: cooled with soot-gray border glass to calm the noon pool.
- Amber: fired low, almost honey, for the west aisle memorial names.
- Emerald: reserved for the restored vinework above the rood screen.
Canonical light register
The same window must tell eight different truths.
Matins leaves a bruised halo. Prime cuts the aisle with blue. Sext is almost judicial. Vespers forgives the repairs. A restored rose is not finished until all eight hours have been argued across a scale floor.
Hour
Light behavior
Conservation question
Lauds
cobalt breaks first, ruby follows
will replacement blue read too clean?
Sext
amber pool becomes the nave center
does the oculus need thicker paint?
Vespers
emerald leans into the choir step
can bowed stone be left confessed?
Private scaffold visits
Bring us a broken rose, a chapel rumor, or a box of unlabeled glass.
Rosarium accepts four major restorations each year. Patrons receive a pigment concordance, a tracery atlas, and a canonical-hour projection study before the first site scaffold is raised.
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