Abstract: The architecture developed in this deltaic region in the Sultani period (1204-1576) had distinctive features from other parts of the world. To propagate Islam across this area, numerous social structures like mosques, madrasas, khankas, and mausoleums were built during the Sultani Period. The Archetype of this religious architecture developed here was an assimilation of contextual constituents and the knowledge of building structure and art imported from the origin of the Sultani rulers. They had to explore their expertise with contextual possibilities due to the unique climatic conditions and soil formation, which resulted in the creation of a style that encompasses structural ideas, functional usage, material, scale, proportion, and aesthetic appeal. Bangladesh is now renowned worldwide for having the finest examples of practicing both Islamic architecture and functioning mosques. The Sultani era archetype serves as an inspiration for many of them. The objective of the current study is to comprehend how the Sultani period archetype has influenced contemporary mosque and other religious architecture practices. As the case studies of the Sultani period architecture Shat Gombuj Mosque (Sixty Domed Mosque) in Bagerhut by Khan Jahan Ali (1352–1576), Noy Gombuj Mosque (Nine Domed Mosque) 15th century in Bagherhut, Kusumba Mosque (1558) Sultan Ghiyasuddin Bahdur Shah Period, Goldi Mosque in Panam Nagar, Hazibar Akbar Shah, 1519, period Sultan Hussain Shah will be analyzed. Bait Ur Rouf Jame Mosque, Faidabad, Dhaka 2013, Marina Tabassum Architects, Zebun Nessa Mosque (2024) in Ashulia, Studio Morphogenesis, Shah Muhammad Mohsin Khan mausoleum (2022), Manikgonj, Dhaka, Shapotik, Miazi Bari Jame Mosque (2013-15) in Chandpur, GoAat (Group of architects and thinkers) will be the contemporary case studies for understanding the impact of Archetype of Sultani Period Islamic Architecture. This study will present a morphological analysis of both types of case studies and the result will display how the knowledge of the Sultani Period Islamic architecture is still relevant and inspirational in today's practice. KEYWORDS: Sultani Period Architecture, Contemporary Mosque Architecture in Bangladesh, Contextuality.