Occasionally (about 1 line in 100) the caesura comes in the 4th foot only.

Latin

Caesurae were widely used in Latin poetry, for example, in the opening line of Virgil's Aeneid:

Arma virumque cano || Troiae qui primus ab oris(Of arms and the man, I sing. || Who first from the shores of Troy...)

This line uses caesura in the medial position. In dactylic hexameter, a caesura