Karim Khan Zand
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While Karim was ruler, Iran recovered from the devastation of 40 years of war, providing the war-ravaged country with a renewed sense of tranquillity, security, peace, and prosperity. The years from 1765 to Karim Khan's death in 1779, marked the zenith of Zand rule. During his reign, relations with Britain were restored, and the East India Company allowed to have a trading post in southern Iran. He made Shiraz his capital and ordered the construction of several architectural projects there.
Following Karim Khan's death, civil war broke out once more, and none of his descendants was able to rule the country as effectively as he had. The last of these descendants, Lotf Ali Khan, was executed by Qajar ruler Agha Mohammad Khan Qajar, who became the sole ruler of Iran. Provided by Wikipedia