Agha (title) in the context of "Kehiya"

Mimar Sinan (Ottoman Turkish: معمار سينان, romanized: Mi'mâr Sinân; Turkish: Mimar Sinan, pronounced [miːˈmaːɾ siˈnan]; c. 1488/1490 – 17 July 1588) also known as Koca Mi'mâr Sinân Âğâ, ("Sinan Agha the Grand Architect" or "Grand Sinan") was the chief Ottoman architect, engineer and mathematician for sultans Suleiman the Magnificent, Selim II and Murad III. He was responsible for the construction of more than 300 major structures, including the Selimiye Mosque in Edirne, the Kanuni Sultan Suleiman Bridge in Büyükçekmece, and the Mehmed Paša Sokolović Bridge in Višegrad, as well as other more modest projects such as madrasa's, külliyes, and bridges. His apprentices would later design the Sultan Ahmed Mosque in Istanbul and the Stari Most bridge in Mostar.

The son of a stonemason, he received a technical education and became a military engineer. He rose rapidly through the ranks to become first an officer and finally a Janissary commander, with the honorific title of Sinan. He refined his architectural and engineering skills while on campaign with the Janissaries, becoming expert at constructing fortifications of all kinds, as well as military infrastructure projects, such as roads, bridges and aqueducts. At about the age of fifty, he was appointed as chief royal architect, applying the technical skills he had acquired in the army to the "creation of fine religious buildings" and civic structures of all kinds. He remained in this post for almost fifty years.

The Kizlar Agha (Ottoman Turkish: قيزلر اغاسی, Turkish: kızlar ağası, lit. '"agha of the girls"'), formally the Agha of the House of Felicity (Ottoman Turkish: دار السعاده اغاسي, Turkish: Darüssaade Ağası), was the head of the eunuchs who guarded the Ottoman Imperial Harem in Constantinople.

Established in 1574, the post ranked among the most important in the Ottoman Empire until the early 19th century, especially after the stewardship of the two holy cities of Mecca and Medina and the supervision of all waqfs (charitable foundations) in the Empire came under his purview. The wealth thus amassed, the proximity to the sultan, and the role the harem ladies played in court intrigues ("Sultanate of Women") meant that its occupant had considerable political influence; several kızlar aghas were responsible for the downfall of grand viziers and the accession of sultans. Soon after its creation and until its abolition, close to the abolition of the Ottoman sultanate, the post came to be occupied by Black African eunuch slaves, and hence is also referred to as the Chief Black Eunuch.

This is a list of titles and appellations used in the Ottoman Empire. In place of surnames, Muslims in the Empire carried titles such as "Sultan", "Paşa", "Ağa", "Hoca", "Bey", "Hanım", "Efendi", etc. These titles either defined their formal profession (such as Pasha, Hoca, etc.) or their informal status within the society (such as Bey, Agha, Hanım, Efendi, etc.). Later, family surnames were made mandatory in Turkey by the 1934 Surname Law.