Coat of arms of Turkey

National Emblem of the Republic of Turkey
Details
Armiger	Republic of Turkey
Escutcheon	Crescent moon and star
Use	Turkish passport, Turkish ID card, Ministry of Foreign Affairs (Turkey)

The Republic of Turkey has no official national emblem, but the star and crescent (Turkish: ay-yıldız "crescent-star") design from the national flag is in use as de facto emblem, among other things printed on Turkish passports, on Turkish identity cards and diplomatic missions of Turkey.

The star and crescent is retained from the 19th-century Ottoman flag, and has acquired its status as de facto national emblem following the abolition of the Ottoman coat of arms in 1922. It was used on national identity cards by the 1930s (with the horns of the crescent facing left instead of the now more common orientation towards the right).

A circular section of the red Flag of Turkey containing the white star and crescent is used in the current emblems of a number of Turkish ministries and governmental institutions, in the emblem of the Grand National Assembly, and as the flag badge on the uniforms of Turkish national sports teams and athletes. It was also used on the old (non-digital) Turkish identity cards.

Circular emblem used as a badge by the national sports teams, as well as for other semi-official purposes

Seal of the Grand National Assembly (parliament)

Seal of the Prime Minister old logo

The Turkish Ministry of Foreign Affairs often uses a red oval-shaped escutcheon which takes its colour from the Turkish flag, while its shape echoes the oval shield at the center of the late 19th-century Ottoman coat of arms. The escutcheon contains a gold-tone star and crescent which are vertically oriented (with the star on top) and surrounded by the gold-tone text T.C. Dışişleri Bakanlığı. A variant of this oval escutcheon (containing the gold-tone text Türkiye Cumhuriyeti Büyükelçiliği) is used by the Turkish embassies.

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Wikipedia