the city of tikal was the biggest city out of the big three and it was the most important and were almost all of the ceremonies were held.
COPAN!!!
This is Copan though very small Copan is a key city with the most farm cropping and along withe Tikal they were great Astronemers.
Quiragua!!!
Quiragua was the second largest city and they started the heiroglyphs and the art and kings looked for natives of quiragua to service them by painting or scolpting them and if it wasn't perfect they were tortured or even killed.