Arch of Bara -Tarraco-, at Tarragona.
 
Alzado del Arco romano de Bara
Elevation of Roman Arch at Bara.

It is the best instance of a monumental arch with one gate on Spain and the best known after Medinaceli -three gates- one. It probably marked a border between two native Iberian tribes: Ilergetes and Casetaninas. It was constructed at the beginning of 1st. century during Augustus Emperor age. It was included in the reform of Herculean Way.
 
It stands at the northern side of city of Tarraco. It is 20 kms. far from it, close to Augustus Way.
 
It is built with opus quadratum, rectangular ashlars of limestone perfectly carved and fit.
 
Lower part is composed by two podiums with rectangular plan. They have three files of ashlars and a cornice with a rectangular section. First file is bigger on plan and has padded ashlars. Stone used for this part is different than the used in the rest of the monument.
 
On these podiums there were two big pillars with four little columns at each side. Columns are placed at the exterior corners -two visible elevations-. The other two at their fronts -a visible elevation-, separated from the lateral by the widht of voussoirs of the semicircular arch that joins both pillars. This arch functions as a vault as it runs all along the building.
 
Pillars are placed on an Attic base, groove columns with 6 grooves and Corinthian capitals. There is an entablature supported by them: only survives an architrave with un upper moulding and a frieze also moulded that bears an inscription. Over it there is a cornice rebuilt with original elements recently recovered. We have neither documentation nor remainings from the attic that would crown this entablature.
Main measures are 12 m. long and 2, 40 m. wide. Each pillar is 3,70 m. long at the main façades and 2,40 m. wide. Total highness is 12,30 m. Added to lost attic, total highness would be close to 14,70 m. Arch is 10,10 m. and radius ca. 2,30 m.
 
Arco romano de BaraArco romano de Bara
Both main façades of Roman arch of Bara.

Inscription is not complete, since lateral ashlars are not the original. Its text reads: EX TESTAMENTO L.LUCINI L. SERG. SURAE CONSACRATUM
 
For a long time, this arch was used as a pass for ways and roads. At 1936 road was divided in two, surrounding this Arch.