Porta Nigra city gate in front of the medieval market cross, Hauptmarkt central square, Trier, Rhineland-Palatinate, Germany, Europe

architecture attraction attractions being beings building buildings central city cross day daylight daytime during europe european exterior exteriors famous federal frg front gate gates german germany hauptmarkt history human humans in known landmark landmarks market medieval nigra of outdoor palatinate people person persons photo photos porta renowned republic rhineland rhineland palatinate roman roman romans seeing shot shots sight sights site sites square the tourist trier view views well well known worth