The structure is located in Paşaköy in Şefaatli, Yozgat, a district 70 km away from Yozgat city center. According to its inscription, it was commissioned by Tokmak (Çerkez) Hasan Paşa in 1187 AH / 1773-1774 AD. The mosque, which was built in the year Hasan Paşa was appointed as governor, is older than the Çapanoğlu and Başçavuş Mosques, which are considered two of the major works from the westernization period. The structure has a vertical rectangle plan and three naves, and the naves are separated with two sets of three wooden posts. The bodies of posts are circular. The two-story structure has a prismatic body in a rectangular shape. It has an even ceiling and hipped roof and does not look different from a regular village mosque from the outside. However, it is very noteworthy in regard to the adornments inside. The structure, which was built using stone materials, has a wooden minbar, nave-separating pillars and ceiling. The surfaces of the minbar and the ceiling were adorned with high quality hand-drawn vignettes with no empty spaces left. Each of the ceilings covering the three-nave structure have a different adornment program. The ceiling that covers the middle nave has three ceiling roses put next to each other. Each ceiling rose is distinct. Ceiling roses were made from laths, and their surfaces were adorned with high- quality naturalist still-life paintings and flowers. Still-life paintings feature naturalist flowers and fruits coming out of vases and pitchers. In addition, two of the spaces between the rose ceilings feature city and castle depictions. Wooden column headers are also high-quality products of workmanship. On the eastern and western facades are framed mosque, Qaba and heaven depictions, which we think were created rather recently. No detailed study regarding the structure and its adornment program have been encountered during the studies until now. This paper will provide a detailed assessment of the structure, which we think is significant especially in regard to its adornment composition.