Plato

Some of Plato's Dialogs, Timeaus and Critias, include something about Atlantis, and were used as sources for this liturgy.

Here is the text of  Timaeus   with an article about it. and also a Wikipedia article about it.


Here is the text of  Critias , an article about it, and a Wikipedia article about Critias.


Timaeus provides  a brief introduction to Atlantis, while Critias includes a more detailed description.  These are the only historical written records about Atlantis.