The Temple in the Underworld is the third studio album by Czech black metal band Root, released in December 1992 through Monitor.

This marked the end of their early raw black metal sound, and was also their last release with guitarist Daniel "Mr.

The lyrics to "Casilda's Song" were taken from the eponymous poem by Robert W. Chambers, originally included on his 1895 book The King in Yellow.

MetalReviews.com gave it an 87 out of 100, stating: "[Its] riffs are simply amazing, prog-tinged creations of epic melody that will have you gasping with pleasurable shock even as you headbang.

Seriously, the hordes of thrashers out there will have their socks blown off by even a few seconds of first track proper 'Casilda's Song', which starts out with epic heavy metal and builds until Big Boss begins to sing and snarl in his usual inimitable way.