I think a Trajan coin commemorating his building infrastructure achievements like his bridge over the Danube would be fitting.
Great thread. Here are a couple of my favorite coins, of my favorite emperors. There's just something special about the Five Good Emperors, and especially these two in my humble opinion. Trajan; AD 98-117 AE Sestertius; 32mm/25.3g OBV: IMP CAES NER TRAIANO OPTIMO AVG GER DAC PMTRP COS VI P Laureate Bust Draped R REV: SENATVS POPVLVS ROMANVS FORTRED SC in exergue; Fortuna Redux seated L holding cornucopia and rudder (RIC 652, Cohen 158) Hadrian; AD 117-138 Bronze Dupondius; 27mm/ 14 g 6 Mar 13 100 VF 120.00 OBV HADRIANVS AVGVSTVS; Radiate Head R, Drapery at shoulder REV: COS III SC; Salus Std L feeding serpent from patera (RIC 657, Cohen 367cf)