The Sanki Yedim Mosque, also known as the Mosque of Mehmed Şakir Efendi or the Mosque of Keçeci Hayreddin, is one of the oldest and most peculiar mosques located in the Fatih district of Istanbul, Turkey. With a history spanning over 400 years, the mosque’s name and story embody remarkable lessons in patience, good intentions, and the concept of saving for charitable causes. Built in the 17th century by merchants who were inspired by the grandeur of Ottoman sultanic mosques, this establishment was founded as a small personal dream meant to leave a lasting legacy.

The story of the mosque's creation revolves around the impressive savings habits of its founder. Both Keçeci Hayreddin Efendi and Aydınlı Şakir Efendi were middle-class merchants who desired to pay homage to the architectural magnificence of their time. One merchant's innovative approach involved depriving himself of luxuries—such as fruits, meats, and sweets—while stating "Sanki Yedim," which translates to "As if I ate." By doing this, he was able to save money and allocate it toward the mosque’s construction instead of indulgences.

Thus, through almost two decades of self-discipline and thriftiness, he managed to gather a significant amount to realize his vision of building a mosque. The Sanki Yedim Mosque stands today not only as a place of worship but also as a testament to the dedication and creativity of its founders in ensuring that their aspirations took form despite economic limitations. This unique narrative not only reflects the mosque's strange name but also serves as an inspiring example of vision and perseverance in the face of adversity.