Paragraphos
A paragraphos was a mark in ancient Greek punctuation, marking a division in a text or drawing the reader's attention to another division mark, such as the two dot punctuation mark.
There are many variants of this symbol, sometimes supposed to have developed from Greek gamma, the first letter of the word graphos. It was usually placed at the beginning of a line and trailing a little way under or over the text.
It was referenced by Aristotle, who was dismissive of its use.
Unicode encodes multiple versions: