46 RES 14 AUTUMN 1987 Figure 17. Seibal Stelae 7. Eighth century. Stelae 5 and 7 at Seibal are in fact wall panels that were set to frame the staircase of Structure A-10, a building on one of the main plazas. Both feature ballplayers, and together the two panels suggest that ball was played on the A-10 stairs.