Achaemenid architecture encompasses all of the Achaemenid Persians' architectural achievements, manifested in the construction of spectacular cities used for governance and inhabitation (Persepolis, Susa, Ecbatana), temples built for worship and social gatherings (such as Zoroastrian temples), and mausoleums erected in honor of the departed. The Achaemenids were the first rulers to have their own distinct style of architecture which could be recognized from a distance after the death of Cyrus the Great in 530 B.C. They built their capital at Persepolis, about 80 miles south of Tehran, where they held court and administered their empire. The city was constructed over an area of roughly 10 square miles with walls that were once 30 feet high and 6 miles long. It included palaces, temples, public buildings, and gardens. Inscriptions on stones found near the site attribute the building of certain parts of the city to different members of the Achaemenid family who ruled during the 2,500 year lifespan of the empire. In addition to constructing cities, the Achaemenids also renovated or replaced existing buildings with new structures. For example, they converted the palace of the Medes into what is now known as the Palace of Cyrus the Great in 522 B.C. This renovation involved adding rooms, bathrooms, and courtyards to the original building. Finally, the Achaemenids are credited with introducing new technologies and ideas from other cultures into their own society.