The Imamzadeh Hossein is the grave mosque of a son of the 8th Imam Ali al-Ridha in Qazvin, Iran that the Safavids - Shah Tahmasp I built in the mid-16th century as a pilgrimage center.
Wikipedia https://en.wikipedia.org/wiki/Imamzadeh_Hossein,_Qazvin
Address Qazvin, Iran
Coordinates 36°15'25.962" N 50°0'2.399" E