Project - South Tower Portal

South Tower Portal,St. Stephen’s Cathedral, Vienna

Entrance hall into the south tower, Madonna, 14th century Laserreinigung, Konservierung, Restaurierung

Client:Dombausekretariat St. Stephan

Project period:2006

Place:St. Stephen’s Cathedral, Vienna

Used technologies

Laser cleaning of the beautiful Madonna

Fully cleaned Madonna, exposed remains of polychromy

Fully cleaned and preserved hall

Undercoat with red colour residues 1.) Limestone, 2.) 40 µm light blue: white lead with some Azurite, oil painting, 3.) 30 µm red: Minium, oil

Coat with blue colour residues 1.) white: white lead, strongly crackled, 1 blue Smalt grain on the surface, possibly only smudged from the overlying layer, strong oil browning on outside, 2.) 200 µm blue: white lead, in contrast to sample with smalt, these from discoloured section, oil colour

Plinth with green rim 1.) Sand and Calcium Carbonate (Limestone), 2.) green paint residues in the depressions: white lead, barite, chalk, ochre and green earth and some ultramarine

South Tower Portal Exterior

South Tower Portal,St. Stephen’s Cathedral, Vienna

Used technologies

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