103-111 AD, Trajan, Rome mint, Sestertius, RIC 569.

Trajan, Rome mint, 103-111 AD.,
Sestertius (ø 33-34 mm / 24,26 g), probably brass ("orichalcum"), axes about coin alignment ↑↓ (ca. 190°),
Obv.: IMP CAES NERVAE TRAIANO AVG GER DAC P M TR P COS V P P , laureate bust of Traian right, drapery on his left shoulder.
Rev.: S P Q R OPTIMO PRINCIPI / S C , Trajan's Danube bridge, depicted as a single arching span over river between entrance and exit gates, covered walkway separated by vertical bars and middle curved line, each gateway surmounted by statuary, right one with flight of steps; boat below.
RIC II, p. 284, no. 569 (common) ; Coh. 542 (8 Fr.) ; cf. BMC 847-51 ; CBN 315 ; Hill, Monuments 201 .

Trajan's Bridge (Serbian: Трајанов мост, Trajanov Most; Romanian: Podul lui Traian ) or Bridge of Apollodorus over the Danube was a Roman segmental arch bridge, the first to be built over the lower Danube. Though it was only functional for a few decades, for more than 1,000 years it was the longest arch bridge in both total and span length.
The bridge was constructed in 105 AD by instruction of Emperor Trajan by Greek architect Apollodorus of Damascus for the deployment of Roman troops during the conquest of Dacia.
more on https://en.wikipedia.org/wiki/Trajan's_Bridge