The third of Vitoria's surviving medieval parish churches, on the eastern edge of the Casco Medieval. The current building is largely 16th-century Gothic, with later baroque additions, occupying the site of an earlier 12th-century church mentioned in city records.
The interior has a fine 17th-century baroque high altarpiece and a set of carved stalls from a dissolved monastery. The exterior, with its bare stone and corner tower, fits naturally into the line of the old town wall.