The Gate of Trajan or Trajan’s Gate (Bulgarian: Траянови врата, Trayanovi vrata) is a historic mountain pass near Ihtiman, Bulgaria. In antiquity, the pass was called Succi. Later it was named after Roman Emperor Trajan, on whose order a fortress by the name of Stipon was constructed on the hill over the pass, as a symbolic border between the provinces of Thrace and Macedonia.