peristylen.

peristyle (n.)1610s, from French péristyle "row of columns surrounding a building" (mid-16c.), from Latin peristylum, from Greek peristylon "colonnade around a temple or court," noun use of neuter of peristylos "surrounded with a colonnade," from peri- "around" (see peri-) + stylos "pillar," from PIE root *sta- "to stand, set down, make or be firm" (see stet).