>>18129404
No, thats the inscription temple anon.
Im refering to the staircase decribed in the tower of palenque's palace by Bernasconi,an italian arquitect who explored and decribed mayan ruins.
Other spiral staircase has been identified in chcihen itza, in the "observatory"/"caracol", and in fact, its called caracol because of the spiral staircase found in it (escalera de caracol).
https://arqueologiamexicana.mx/mexico-antiguo/el-caracol-o-el-observatorio>>18129404