Temple of Apollo Grannus

The Temple of Apollo Grannus features a sacred pool, underground water conduits, and multiple bathhouses connected through a network of Roman architecture.

Emperor Constantine visited this religious complex in 310 CE, during a period when the settlement experienced substantial growth and increased population.

The temple served as a center for healing rituals, combining Germanic traditions with Roman religious practices through the worship of Apollo Grannus.

The archaeological site lies within a circular boundary road measuring 888 meters in diameter, now marked by present-day Grand's perimeter.

Natural limestone formations beneath the temple created underground caves where water collected and disappeared through faults, resurfacing two kilometers northeast.

GPS coordinates: 48.56170,10.40880

Latest update: March 3, 2025 14:05