Yedikuleli Seyyid Abdullah Efendi (Ottoman Turkish: يدى قللى سيد ابدالله Modern Turkish: Yedikuleli Seyyid Abdullah Efendi) (d. 1731) was an Ottoman calligrapher.
As a court calligrapher he taught as a student Egrikapili Mehmed Rasim Efendi. Sultan Ahmed III at one point was so intrigued by the ink that Seyyid used in his calligraphy, that he sent a messenger to learn the secret. Seyyid sent back a full inkwell with the messenger. When the Sultan received the gift, he reportedly emptied the ink, refilled the inkwell with gold, and sent it back.
References
Yedikuleli Seyyid 'Abdullah Efendi Wikipedia(Text) CC BY-SA