>>18126917
>>Basilicas were enclosed structures with arches and vaults
Yes, i dont remember any pyramid with vaults, but mesoamerican cities, specially the posclassic mayan ones did have sophisticated vault systems, since the vault arquitecture had its own development in mesoamerican histroy. https://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-25742020000100065
>>Basilicas have vast, open naves supported by columns and arches while pyramids have no significant internal chambers.
Some of them did. The "Templo of las inscripciones" for example had an internal chamber in which the king pakal was buried.
>>Not to mention internal spiral staircases
There were also spiral staircases in mesoamerican cities. For example, in Palenque, Juan Bautista Muñoz, who explored the ruins of the tower in 1700s described a spiral staircase in the tower of palenque.
http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S2027-51372014000100003