Hülegü Khan of the Mongols conquered Baghdad in 1258, effectively ending the Abbassid Caliphate.
There are quite a number of Arab Empires. Assuming you are referring to the Abbassid Caliphate, that was destroyed in 1258, when the Mongols led by Hulegu Khan razed Baghdad to the ground.
Osman the first (1258-1324).
Hulagu Khan of the Mongols defeated Abbasid Caliph Al-Musta'sim in 1258 in Baghdad. He completely conquered the Abbassid Empire and made sure to raze every city to the ground that gave him one iota of resistance.
Arab Cooperation Council ended in 1994.
Arab Super Cup ended in 2001.
When the Abbaside were in power the greatest Arab empire was the Abbasid Caliphate (750-1258). It was the second largest Muslim (not just Arab) empire in history, second only to the Umayyad Caliphate (661--750) which preceded it.
There are quite a number of Arab Empires. Assuming you are referring to the Abbassid Caliphate, that was destroyed in 1258, when the Mongols led by Hulegu Khan razed Baghdad to the ground.
No, Baghdad was not burned down by the Seljuks. The Seljuks did capture Baghdad in 1055 and weakened the Abbasid Caliphate, but they did not completely end the Arab empire. The Arab empire continued to exist, albeit in a weakened state, until the Mongol invasion in 1258.
Solms ended in 1258.
County of Solms ended in 1258.
Santa Igia ended in 1258.
Osman the first (1258-1324).
The burning of Baghdad effectively ended the Abbassid Empire and confirmed what most Muslims had already suspected for generations, which was that the idea of a unified Islamic World would remain an object of the past.
Al-'Adudi Hospital ended in 1258.
When Halagu Khan, the Mongol general sacked Baghdad.
Hulagu Khan of the Mongols defeated Abbasid Caliph Al-Musta'sim in 1258 in Baghdad. He completely conquered the Abbassid Empire and made sure to raze every city to the ground that gave him one iota of resistance.
The Ottoman Empire