Information on the monastery church (basilica) of St. Mauritius:
The choir: was vaulted from the beginning, while the nave had a wooden ceiling until the middle of the 16th century. Only Abbot Paulus Gmainer (1550-1585) had the nave vaulted.
From 1718-1724 the interior of the church was given the most magnificent baroque style. The medieval outer walls with the mighty buttresses have been preserved. The Gothic bundle pillars were walled in, baroque vaults were added and galleries were created above the side aisles.
Stucco: the brothers Giovanni Battista and Sebastiano d'Allio from the Innviertel were responsible for the bandwork style.
Ceiling paintings: Wolfgang Andreas Heindl, from Wels, created a total area of 1,530 m² in two summers.
High altar: The mighty, 19 m high altar was built in Stadtamhof (Regensburg) in 1703 and was shipped to Niederalteich. The altarpiece from 1675 is enormous, measuring 580 cm high and 340 cm wide.
Carved figures: The altar is flanked by larger-than-life figures of St. Benedict and his sister Scholastica. The excerpt picture above was created around 1720.
Pulpit: The richly decorated pulpit was created around 1690.
Side aisles: these contain a total of eight altars. Something special about the side altars are the glazed shrines with the so-called holy bodies. These are skeletons of alleged martyrs, which were found in the Roman catacombs and came to Niederalteich in 1723.
Organ case: The baroque organ case contains a 1985 mechanical work by Georg Jann from Alkofen, with 48 registers, 4 manuals and 3,555 pipes.
Church Pews: Very rich with lavishly carved acanthus tendrils on the pedestals and floral ornaments on the front and back walls of the pews. It was made together with the confessionals by Brother Pirmin Tobiaschu and his assistants.
Sacristy: it is one of the most beautiful of its kind in southern Germany and is the work of old Bavaria's most important baroque master builder, Johann Michael Fischer from Munich. The flat, three-part cap vault bears frescoes by Wolfgang Andreas Heindl. The stucco work was in the experienced hands of the d'Allio brothers. The magnificent oak cabinets were created between 1724 and 1727.