A granite gate marking the road to the Albarregas river

The Arco de Trajano in Mérida is a monumental Roman gateway. Although it has been traditionally known as the arch of Trajan, there is no foundation that relates it to that specific emperor. In 1912, it was declared a National Monument, and since 1993, it has been part of the UNESCO World Heritage site for the archaeological complex of Mérida.

This semicircular arch stands about fifteen metres tall, including two metres of base currently buried under the pavement. The structure is built of granite with regular blocks and voussoirs nearly 1.4 metres high. These stones were originally covered in ornamental marble, as indicated by a series of holes visible on the masonry today. Because the marble casing and its inscriptions were lost, it is very difficult to determine the exact moment of its construction.

While its purpose has been interpreted in various ways, the arch was intended to be a significant landmark in the Roman urban fabric. From its location, an alignment can be followed to the Albarregas river, marking the path of the cardo máximo, one of the most important roads in the city. The arch likely served as a monumental gate to the city's first enclosure or as a boundary for this major thoroughfare.

Nearby excavations have uncovered bronzes and inscriptions suggesting the existence of a second forum in Augusta Emerita, which would have served as a provincial forum for Lusitania. The Arch of Trajan would have been part of this urban ensemble, acting as a delimiting element between different spaces and serving as the monumental entrance to this large enclosed area.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons