20 Lira Esrefoglu Mosque

The Eşrefoğlu Mosque in Beyşehir, completed around 1299 under the Karamanid-allied Eşrefoğlu Süleyman Bey, is one of the last surviving examples of the Anatolian wooden-hypostyle mosque form — a tradition that essentially died with the consolidation of Ottoman stone construction. Its 48 wooden columns and original hand-painted ceiling have remained largely intact for over seven centuries, a structural continuity rare enough that UNESCO has repeatedly flagged it for inscription consideration. Turkey's commemorative silver program has drawn on provincial architectural heritage with increasing frequency since the mid-2010s, partly as a deliberate counter to the Ottoman-imperial emphasis that dominated earlier issues.