At least 14,000 people have been arrested, from famous celebrities, journalists and lawyers to ordinary people, according to the UN.
The video of the couple was hailed as a symbol of the freedom demanded by the protest movement, with Ahmadi at one point lifting his partner into the air with her long hair flowing from behind.
One of the main icons of the Iranian capital, the gigantic and futuristic Azadi (Freedom) Tower is a place of great sensibility.
It opened during the reign of the last Shah, Mohammad Reza Pahlavi, in the early 1970s, when it was known as the Shahyad Tower (In Memory of the Shah).
It was renamed after the overthrow of the Shah in 1979 with the creation of the Islamic Republic. Its architect, a member of the Baha’i faith, not recognized in modern Iran, now lives in exile.
