title: Classis
text: # Classis
  
  Classis may refer to:
  
  * Classis (ecclesiastical), governing body of pastors and elders in certain churches
  * Classis (biology), or class, a taxonomic rank or unit in biology
  * Classis (port), or Classe, ancient port of Ravenna, Italy
  * Roman classis, fleet of Roman navy
  