Stela 31 was entombed above the remains of Siyaj Chan K'awiil II during the third phase of construction, when it was moved to a new resting place within the second phase shrine.
The monument consists of the upper two-thirds of the original stela, which was broken prior to being re-erected in its new location.
Stela 31 was dedicated in AD 445 and depicts Siyaj Chan K'awiil II with his symbols of rulership; his father Yax Nuun Ayiin I is depicted in three places upon the monument.
It was sculpted in a deliberately archaic style and copied its form from Stela 29, erected a century and a half earlier.
The stela shows strong Teotihuacan influence, with Siyaj Chan K'awiil II adorned with a Teotihuacan emblem.
Yax Nuun Ayiin is sculpted on both sides of the monument, flanking his son upon the front; Yax Nuun Ayiin is depicted as a Teotihuacano warrior.
Siyaj Chan K'awiil's father is also depicted hovering above him on the front of the monument; here he is depicted in fully Maya style as the ancestral sun god.
The rear face of the stela is carved with a lengthy hieroglyphic text that legitimises Siyaj Chan K'awiil's right to rule through his mother's line and the foundation of the new Teotihuacan-linked dynasty; it briefly mentions Siyaj Chan K'awiil's accession, the baktun ending of 435, the monument's dedication and the death of the king's grandfather Spearthrower Owl in 439.

Altar 19 was buried in the fill of the final version of Temple 33, immediately in front of the second version of the shrine.
The altar was badly damaged, having been broken into three pieces, and the majority of a sculpture depicting a seated person was chipped away.
The three fragments were buried together in a way that paired the altar with the buried Stela 31; this may have maintained a relationship between the two monuments that existed when they were originally on public display.
The altar was crafted from limestone and is now in the site museum at Tikal.
It has been dated to approximately AD 445.
Stela 31 was entombed above the remains of Siyaj Chan K'awiil II during the third phase of construction, when it was moved to a new resting place within the second phase shrine. The monument consists of the upper two-thirds of the original stela, which was broken prior to being re-erected in its new location. Stela 31 was dedicated in AD 445 and depicts Siyaj Chan K'awiil II with his symbols of rulership; his father Yax Nuun Ayiin I is depicted in three places upon the monument. It was sculpted in a deliberately archaic style and copied its form from Stela 29, erected a century and a half earlier. The stela shows strong Teotihuacan influence, with Siyaj Chan K'awiil II adorned with a Teotihuacan emblem. Yax Nuun Ayiin is sculpted on both sides of the monument, flanking his son upon the front; Yax Nuun Ayiin is depicted as a Teotihuacano warrior. Siyaj Chan K'awiil's father is also depicted hovering above him on the front of the monument; here he is depicted in fully Maya style as the ancestral sun god. The rear face of the stela is carved with a lengthy hieroglyphic text that legitimises Siyaj Chan K'awiil's right to rule through his mother's line and the foundation of the new Teotihuacan-linked dynasty; it briefly mentions Siyaj Chan K'awiil's accession, the baktun ending of 435, the monument's dedication and the death of the king's grandfather Spearthrower Owl in 439.
Altar 19 was buried in the fill of the final version of Temple 33, immediately in front of the second version of the shrine. The altar was badly damaged, having been broken into three pieces, and the majority of a sculpture depicting a seated person was chipped away. The three fragments were buried together in a way that paired the altar with the buried Stela 31; this may have maintained a relationship between the two monuments that existed when they were originally on public display. The altar was crafted from limestone and is now in the site museum at Tikal. It has been dated to approximately AD 445.
Tikal Temple 33