Roman marble amphitheatre built in the 2nd century, Plovdiv, Bulgaria, Europe

travel destination horizontal outdoors day bulgaria no people building exterior architecture historical heritage tourist attraction picturesque scenic place of interest man made landmark plovdiv roman marble amphitheatre 2nd century ancient monument archaeological site old historic steps plovdiv antique theater traditional roman theatre stone structure trajan grandeur roman empire pillar column outdoor outside nobody no one no one buildings bulgarian europe european architectural daytime