Probably better known as Si-e Tir Street. Si-e-Tir, which is Persian for “Tir 30th” (the fourth month on the Iranian calendar), is a street in Tehran’s District 12 named in commemoration of the July 21, 1952 uprising, which coincides with Tir 30th on the local calendar.
Tir 30th marks the date when Mohammad Reza Shah Pahlavi, the second and last Pahlavi king, gave in to people’s demand after three days of bloody protests and reinstated Mohammad Mossadeq as the country’s prime minister.
This street breaks the religious stereotypes about what we call the Islamic Republic of Iran these days: a synagogue, a mosque, 2 Christian churches and a Zoroastrian fire temple sit together on this cobblestone street.
The following linked article by Juli Xiang contains additional information and photos for sightseeing: http://caravanistan.com/iran/tehran/si-e-tir-street/