It was built on a hill overlooking the Jalón valley, situated nearly 1200 meters high in a cold area prone to rain, winds, and snowfall, which caused the wear of the ashlar masonry, moldings, and cornices.

[3] The central arch, crowned with a molding similar to the lower elements, has a span of 1.90 meters and is made up of 23 voussoirs and two decorative side sets.

These sets consist of fluted pilasters with a Corinthian capital, a tympanum, and two bases resting on the lower molding.

Golden letters were anchored to these blocks to form the commemorative inscription, leaving some fastening bolts.

It was modified in 98 AD to NVMINI IMP (eratoris) TRAIANI AVG (usti) GER (manici).