Ahmed I

Upon his accession, Ahmed I spared his brother Mustafa I from execution, breaking the tradition of fratricide established by Mehmed II. Instead, he placed Mustafa in confinement (kafes). This reform changed Ottoman succession practices, ending the killing of brothers.

Ahmed I's empire signed the Treaty of Zsitvatorok with the Habsburg monarchy, ending the Long Turkish War. The treaty recognized the Habsburg emperor as equal to the Ottoman sultan and established a peace that lasted for decades.

Ahmed I's grand vizier Kuyucu Murad Pasha brutally suppressed the Celali rebellions in Anatolia, killing tens of thousands. The rebellion was crushed by 1610, restoring order but at a high human cost, leaving the countryside devastated.

Ahmed I commissioned the construction of the Sultan Ahmed Mosque in Istanbul, known as the Blue Mosque for its blue tiles. Completed in 1616, it was the first imperial mosque built in over 40 years and became a symbol of Ottoman architecture.