The writing of Arabic letters in accordance with aesthetic rules and rules is called "Hüsnü Hat" or "Hat Sanatı" in the sense of beautiful writing. Since the birth of arabic calligraphy, many types of writing have emerged. Some of these articles were popular, while others were completely out of use. Although eleven types of writing are used today, the types of writing that constitute the main character of our calligraphy consist of six types of writing called "aklam-ı sitte". After these writings, the most famous one is undoubtedly the talik script with its unique attitude and aesthetic features. Talik script was born and developed in Iran in the second half of the 8th century and came to the Ottomans in the 15th century. From the 18th century onwards, the Ottoman talik script was introduced by the calligrapher Yesari Mehmed Esad Efendi and his son Yesarizade Mustafa İzzet Efendi, adopting a Turkish accent. Calligrapher Sami Efendi, who was the last great representative of the Ottoman talik school, was Ali Haydar Bey. This article has been written in order to introduce this great calligrapher and to examine one of his works in the Konya Region Manuscripts collection and to transfer this cultural heritage to future generations.