Seyed Abdollah Mojtahed Behbahani Was born in Najaf. His Father (Seyed Islam Mojtahed) was the clerics of Tehran. His Ancestors were residents of Bahrain Island that because the Wahhabis power, they Left Bahrain.They were settled in Behbahan and they has been called Behbahani. Seyed Abdollah in Najaf educated with sheikh Morteza Ansari and others and received degrees Ijtihad. In 1295 A.H he came to Tehran, and instead of his father, to pay for religious and Social affairs.He Joined to Seyed Mohammad Tabatabaie during Constitutional movement and he also opposed Darla chancellor. He wants to sit in the shrine if constitutional ist of Imam Abdol-Azim (Hassani Rey) and Qom.After the ball close to the parliament, he was arrested and was deported to Iraq (Kerman shahan) that them he returned to Tehran after Conquest. And he was welcomed with passionate people and constitutionalists. On Friday, 8 Rajab 1328 A.H, he was killed in home to three anonymous. His killer knows the bunch of Haidar Aughly uncle That This Work has been done Hassan Taghizadeh. He was buried in the family mausoleum in Najaf.