The interior of Graz Cathedral combines its Gothic structure with Baroque elements. The central nave is high and well-lit, with plastered walls and stucco ribs on the vaults, while sunlight enters through high lancet windows. Prominent on the south wall are two late medieval frescoes of
Saint Christopher (circa 1460–70), one of which depicts Emperor
Friedrich III wearing a
ducal hat. Baroque furnishings are prominent throughout the space. The high altar (1730–33), designed by
Georg Kraxner, is made of richly veined
marble, and its main altarpiece (by
Franz Ignaz Flurer, 1733) depicts the patron Saint Giles, flanked by statues of the
Four Evangelists. The pulpit and
choir stalls also from the 18th century are intricately carved with
Jesuit symbols. Two
Renaissance reliquaries stand on pedestals at the entrance to the chancel arch, these are the ornate ivory-inlaid
Brauttruhen (bridal chests) of Paola Gonzaga, repurposed by the Jesuits as reliquaries for
martyrs. Among the cathedral’s most significant medieval artworks is the
Gothic crucifixion panel (1457) by
Conrad Laib of Salzburg. This oil-on-wood piece, titled
Crucifixion in the Crowd (
Kreuzigung im Gedräng), was originally part of a
high altar, later rediscovered in fragments, and subsequently restored. It is regarded as one of the finest late-Gothic paintings in
Austria and has recently been reinstalled in the former
Friedrichskapelle (Imperial Oratory) in the south aisle. Another notable relic of the Gothic era is the
Landplagenbild (1485), which remains on the exterior wall as a rare example of early fresco painting. The cathedral interior combines its 15th-century architectural structure with a Baroque ensemble of
altars,
statues, and
paintings, reflecting successive periods of
devotional art. == Religious Significance ==