periaktoi: (περίακτοι) : peh-RIH-ak-toy

(Greek; sing. periaktos: from Greek, revolving; three-sided, revolving scenic device for quickly changing the scene). This was a device for changing scenery by mounting three upright, painted flats on a triangular base. By rotating the unit, three different painted “looks” could be revealed to the audience. Used for quickly changing scenic backgrounds.