The Arch of Trajan is an ancient Roman triumphal arch in Benevento. It was erected in honour of the Emperor Trajan across the Via Appia, at the point where it enters the city. The arch was built between 114 and 117.
In Lombard times, it was incorporated into the southern sector of the city walls and became known as Porta Aurea ('Golden Gate'). The church of Sant'Ilario, now housing the Videomuseum of the Arch, was built nearby. The arch was studied by Sebastiano Serlio in Renaissance times and drawn by Giovanni Battista Piranesi in the 18th century.
It was restored several times due to aging and earthquakes: under Pope Urban VIII, then in 1661, 1713 (after the marble architrave crumbled) and 1792. In 1850, on the occasion of Pope Pius IX's visit to Benevento, it was isolated through demolition of the adjoining buildings.
The arch has a single, barrel-vaulted archway, and is 15.60 m high and 8.60 m wide. Each façade has four pilasters at the corners of the two side pillars, supporting an entablature. Above the architraves is an attic which, like them, juts out in its central section above the archway. The arch is built in limestone covered by opus quadratum of Parian marble slabs. It has richly sculpted decorations on the two main façades. The attic features a dedicatory inscription and, at the sides, two bas-relief panels: on the outer sides the left-hand one, only partially preserved, depicted the Homage of the divinities of the province's countryside, and the one on the right the Founding of provincial colonies. On the inner side, on the left, was a depiction of Trajan welcomed by the Capitoline Triad and, on the right, Trajan in the Forum Boarium.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.