This article offers an overview of Pentecostal participation in ecumenism around the world. The term “ecumenism” derives from the Greek word oἰkouméne, which since antiquity has referred to “the whole, inhabited world”, that is, the “household of creation”. Its modern usage refers primarily to work done to restore unity and renew the Church, the “household of God” (Eph. 2:19). Ecumenism begins at the spiritual level for all who are “in Christ” but it involves more than interdenominational cooperation. It includes th…