One of the most important Islamic poets/mystics/everything in Islamic literature.

Divan-i Shams-i Tabrizi

A collection of poetry by the Persian Sufi poet and mystic Rumi, with themes of love and longing.

Dedicated largely to the disappearance of his spiritual teacher Shams-i Tabrizi.

Rumi met Shams in 1244 CE. Sham's disappeared briefly between 1246-47, then disappeared permanently in 1248 CE. Eventually Rumi would get confirmation that Sham had died.

Masnavi

Six books of poetry on how Sufi's can relate to God. It's "been viewed by many commentators as the greatest mystical poem in world literature".

Started when Rumi was 54 and continued up until his death in 1273.