The Dominican Monastery (German: Dominikanerkloster) is a former Christian monastery in Frankfurt am Main. It is the seat of Protestant Regional Association, a group of Protestant congregations and deaneries in the city, and serves as the convention site for the Synod of the Protestant Church in Hesse and Nassau, held usually twice a year. The former monastery compound includes a Lutheran church building, called the Church of the Holy Spirit (German: Heiliggeistkirche).