The tyrant Peisistratus constructed a temple dedicated to Olympian Zeus around 550 BCE. The building was demolished after his death, but around 515 BCE, his sons began building a new colossal temple in the Doric order. However, this project remained unfinished due to the fall of the tyrants and the high cost. The Athenians used some of the material in constructing the Themistoclean wall. Emperor Hadrian finally completed the grandiose plan in 129 CE as part of his major rebuilding programme for Athens. A colossal statue of Zeus occupied the main interior room of the temple. A luxurious bathhouse was built to the north of the temple, while an arch in honour of Hadrian was added to the northwest side of the Olympieion complex. Two inscriptions carved on the architrave indicate that the arch marked the division between the classical city and the Roman expansion built by Hadrian in the second century. In 1778, the Athenians incorporated the gateway to the Ottoman wall that surrounded the city. The old arch was then known as the “Gate of the Princess” or “Kamaroporta”.