English: Lead seal of Kayqubad. Antalya, Turkey, Antalya Museum, numismatic collection, inv. no. B112. (T. M. P. Duggan, "A 13th Century Profile Portrait Seal Depicting the Face of the Rum Seljuk Sultan Alaed-Din Keykubat I (1220-37) from Antalya Province: Precedents and Possible Influence," Adalya 10 [2007]: 346, figs. 1 and 2)

• "Inclusion of a “likeness” of the sultan, in profile, on the obverse; this is framed by an inscription band with Kayqubad’s name and titles: “The Magnificent Sultan, the Highness of the World and of Religion, Kayqubad son of Kaykhusraw” (al-Sulṭān al-muʿaẓẓam ʿalā al-dunyā wa ’l-dīn Kayqubād bin Kaykhusraw). Another epigraphic band similarly outlined a rampant lion on the reverse, with the additional title of “Father of Conquest” (al-Sulṭān al-muʿaẓẓam ʿalā al-dunyā wa ’l-dīn abū’l-fatḥ Kayqubād bin Kaykhusraw)" in (1 January 2012). "‘ALA AL-DIN KAYQUBAD ILLUMINATED: A RUM SELJUQ SULTAN AS COSMIC RULER". Muqarnas Online 29 (1): 155.

DOI:10.1163/22118993-90000186.

• "In my opinion, the seal depicts not a naturalistic “portrait” of Kayqubad but instead an idealized “bust” in the classical Hellenistic-Roman heroic tradition." in (1 January 2012). "‘ALA AL-DIN KAYQUBAD ILLUMINATED: A RUM SELJUQ SULTAN AS COSMIC RULER". Muqarnas Online 29 (1): 155.

DOI:10.1163/22118993-90000186.