Naser alDin Shah Qajar , also Nassereddin Shah Qajar, was the King of Persia fromSeptember 1848 toMay 1896 when he was assassinated. He was the son of Mohammad Shah Qajar and Malek Jahn Khnom and the third longest reigning monarch in Iranian history after Shapur II of the Sassanid dynasty and Tahmasp I of the Safavid Dynasty. Nasser alDin Shah had sovereign power for close to 50 years and was also the first modern Iranian monarch to formally visit Europe.
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Source: Wikipedia