Who finally conquered Constantinople?
After a lengthy siege, the forces of the Ottoman Empire under Sultan Mehmed II successfully took Constantinople and ended the Eastern Roman Empire.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Who finally conquered Constantinople?
### Input: 
### Response: After a lengthy siege, the forces of the Ottoman Empire under Sultan Mehmed II successfully took Constantinople and ended the Eastern Roman Empire.