The Saint-Martin is a late Lower Rhenish Gothic style church, entirely vaulted with ribbed cross vaults. It consists of a single-aisled choir dating from the mid-15th century and a nave with a north aisle from the last quarter of the 15th century. On the south side of the nave is a Gothic portal; on the north side of the choir is a sacristy. Set into the north wall of the choir is a side wall from a 10th-century crypt. Beneath the church, covered by a concrete floor, lie the foundations of two Roman temples and pre-Romanesque churches. The church contains a richly carved pulpit dating from 1793, decorated with statues of the Evangelists at the corners, originally from the Restored Evangelical Lutheran Church in Amsterdam.

Temples of Elst

The remains of two Roman temples, known as the Temples of Elst, are preserved in the undercroft of Saint Martin's Church. The second temple—one of the largest Roman temples discovered north of the Alps—formed part of the Lower Germanic limes, positioned along the line of frontier forts that marked the northern boundary of the Roman Empire.

The monumental scale of Temple II, likely constructed as part of a broader imperial building program, suggests the involvement of the Roman military in its construction. The principal deity worshipped at the site, Hercules Magusanus, appears to have been especially popular among soldiers and veterans.

The Temples of Elst are inscribed as part of the Lower German Limes within the UNESCO World Heritage Site Frontiers of the Roman Empire. - AsNotedIn