Coat of arms of Chietla 
source: http://www.inafed.gob.mx/work/enciclopedia/EMM21puebla/municipios/21051a.html

https://codicemendoza.inah.gob.mx/index.php?lang=spanish&amp;folio_number=48&amp;type=r&amp;section=t
Own work
COAmaker17