History:

The Acrostic is a poetry form with a long history, used in the Hebrew Bible, The Book of Lamentations, throughout the medieval period by poets such as Middle High German poet Rudolf von Ems to spell either their name or the name of their patron, and the Renaissance to spell out secret messages. The word comes from the French acrostiche from post-classical Latin acrostichis, from Koine Greek ἀκροστιχίς, from Ancient Greek ἄκρος “highest, topmost” and στίχος “verse”.

Structure:

• The Acrostic’s basic rule is that a set of letters taken in order form a word or a phrase throughout the poem. Although it is most common, and most commonly and erroneously thought to be necessary, for the letters to be the first letter of each line, it is also true that it can be the last letter of each line, which is more accurately called a Telestic poem, or both, considered a double acrostic, or another recurring feature of the poem such as a paragraph.

 

Sources:

Wikipedia

Thanet Writers