Qutbuddin Aibak, founder of the Slave Dynasty, built the Dhai Din Ka Jhonpra Mosque in Ajmer shortly after conquering the region from the Chauhans. The mosque was constructed using portions of earlier Hindu-Jain temples, resulting in a distinctive architectural fusion. Its name, meaning “shed of two-and-a-half days,” may refer to the rapid early construction phase, although later additions continued beyond that period. As one of India’s earliest surviving mosques, it reflects the transitional phase of Indo-Islamic architecture. Aibak’s construction of this mosque symbolized the establishment of Muslim rule in Rajasthan and showcased early Sultanate architectural experimentation.