Reused tufo block carved to be a threshold for room H-19 abutting mosaic 7313 and walls 7311 and 7310. Shows likely northern limit of room H-19 but rest of the line is badly eroded or robbed away.
Mosaic and surrounding features
Photo Facing East
Photo Facing North
Photo Facing South
Photo Facing West
Sketch of SUs 7313, 7314, 7319, 7345