Qazvin Vazir House, which is also known as Qazvin Vazir Caravanserai, is one of the parts of Qazvin market, which is located in front of the eastern side of Qaysariyeh. Its entrance vestibule has cells with tiled arches and above the central entrance space, there is a brick dome with a skylight approximately one meter in diameter. Around the wide courtyard of the Vazir palace, there are cells on two floors and they are located on a level with a height of one meter from the ground. The design of the house has four porches and its eastern side does not have a porch. All the cells have a rib vault and most of them on the second floor have a sash (a type of old door with a special frame that opens and closes with a vertical movement). In the lakhki of the vault of the cells, you can see tiling in different designs and motifs such as lion and bird hunting hall, slime and book designs, horse, sun and winged man. This work was registered as one of the national works of Iran on 2001 March 15 with registration number 3312 and is known as one of the famous places of Qazvin.