St. Lambert, Religious monument in Seeon-Seebruck, Germany

St. Lambert is a former Benedictine monastery church in Klosterseeon, part of Seeon-Seebruck. Its core is a Romanesque column basilica with a three-aisled nave and three choirs. The west facade has two octagonal towers built of tuff and fieldstone, topped by dark grey-green onion domes from the 16th century. A red-roofed section adjoins the white main building.

The Benedictine monastery of Seeon was founded in the late 10th century by Count Palatine Aribo I and his wife Adala of Bavaria; nothing is known of its first church. Aribo II probably built a three-aisled basilica in the late 11th century, to which the north tower and the red sandstone stepped portal belong. Around 1200 the south tower and the two-storey porch between the towers followed. Abbots Simon and Erhard Farcher had the church rebuilt in late Gothic style from 1392, and Bishop Leonhard von Laiming of Passau consecrated it in 1433.

The church is dedicated to Saint Lambert of Liège, Bishop of Maastricht, whose relics were venerated at Seeon Abbey. The high nave walls, painted around 1625, show scenes from the life of Jesus together with the monastery founders Aribo and Adala, Saint Benedict and Saint Lambert himself. The vault paintings of the late 16th century depict the Christ Child and the Fourteen Holy Helpers in the nave.

The church stands in Klosterseeon, part of Seeon-Seebruck in the Traunstein district of Upper Bavaria. The west front with its two octagonal towers and onion domes faces the visitor; the Madonna with Child by Johann Schwaiger (1721) sits in a roofed niche above the porch portal. The interior is entered through the two-storey porch between the towers.

The two west towers keep their 11th/12th-century core of tuff blocks and field stones, but their onion domes date only from after the monastery fire of 1561, when they replaced the Gothic spires. Below the eaves runs a late-Gothic tracery frieze, and a Madonna and Child carved in 1721 by Johann Schwaiger of Reichenhall stands in a roofed niche above the porch portal.