40.0985°N, 8.4913°W.
Conimbriga Labyrinth Mosaic is a labyrinth installation in Coimbra district, Portugal. The design is a roman meander layout with 4 circuits, 5 walls, built of mosaic. Documented age: 2nd-3rd century AD (100 - 300 AD). Current condition: intact. A spectacular Roman labyrinth mosaic floor with the Minotaur at its center, preserved at Conimbriga — the largest and best-preserved Roman ruins in Portugal. Documentation sources: Kern 2000. The labyrinth pattern occurs nowhere in nature; every documented instance traces back to a human hand. The labyrinth is one of several hundred sites of this type catalogued globally; each preserves the same unicursal walking-pattern with regional variation in scale, material, and date.
The labyrinth tradition spans at least 4,000 years of documented practice across northern Europe, the Mediterranean, the British Isles, North America, and the Indian subcontinent.