The Masoudieh Mansion () is a historic mansion in Tehran, Iran. It was built as a residence for the Qajar prince Mass'oud Mirza Zell-e Soltan in 1878, hence the name Masoudieh.
Masoudieh has gone through many historical events ever since it was built. During the constitutional revolution, due to the disagreements Zell-e Soltan had with Mozaffar ad-Din Shah and later Mohammad Ali Shah, his mansion became a revolutionary foothold. In 1908, a handmade bomb exploded under the Shah's carriage near the mansion, giving him the excuse to carry out the 1908 bombardment of the parliament.
Many of the first cultural institutions of Iran were first founded in Masoudieh. For example, the first national library and national museum were established in this place.
For a short time in 1963âÂÂ1964 the mansion was used as military college. It was later given to the ministry of education after its establishment. On 1 March 1998, the government decided to give the building to the organization of national heritage (that had not yet become a ministry and operated under Ministry of Culture and Islamic Guidance). On 17 January 1999, it was listed in the national heritage sites of Iran with the number 2190. In 2011âÂÂ2013, its Qajar remains were investigated by the Iranian archaeologist Naser Norouzadeh Chegini.
The garden of the Masoudieh mansion was built by the order of Mass'oud Mirza Zell-e Soltan, a son of Naser al-Din Shah Qajar, in 1295 A.H. It was built by the work of Reza Qoli Khan (nicknamed Siraj al-Mulk) on a land with an area of about 4000 square meters, with an exterior (diwan house) and interior and other annexes.