Siege of Baghdad: Hulegu Khan, a prince of the Mongol Empire, orders his army to sack and plunder the city of Baghdad, which they had just captured.

The siege of Baghdad took place in early 1258. A large army commanded by Hulegu, a prince of the Mongol Empire, attacked the historic capital of the Abbasid Caliphate after a series of provocations from its ruler, caliph al-Musta'sim. Within a few weeks, Baghdad fell and was sacked by the Mongol army—al-Musta'sim was killed alongside hundreds of thousands of his subjects. The city's fall has traditionally been seen as marking the end of the Islamic Golden Age; in reality, its ramifications are uncertain.

Hulegu Khan, also known as Hülegü or Hulagu, was a Mongol ruler who conquered much of Western Asia. As a son of Tolui and the Keraite princess Sorghaghtani Beki, he was a grandson of Genghis Khan and brother of Ariq Böke, Möngke Khan, and Kublai Khan.

The Mongol Empire was the largest contiguous empire in history. Originating in present-day Mongolia in East Asia, the empire at its height stretched from the Sea of Japan to Eastern Europe, extending northward into the Arctic; east and southward into the Indian subcontinent, mounting invasions of Southeast Asia, and conquering the Iranian plateau; and reaching westward as far as the Levant and the Carpathian Mountains.

Baghdad is the capital and largest city of Iraq, located along the Tigris in the central part of the country. With a population exceeding 7 million, it ranks among the most populous cities in the Middle East and Arab world and forms 22% of the country's population. Spanning an area of approximately 673 square kilometres (260 sq mi), Baghdad is the capital of its governorate and serves as Iraq's political, economic, and cultural hub.