Luna Mortis, formerly The Ottoman Empire, was an American heavy metal band based in Madison, Wisconsin.

The band was formed in late 2001 in Monroe, Wisconsin as The Ottoman Empire. In 2006, the band self-released their debut studio album, Way of the Blade. In June 2007, Luna Mortis played the first Flight of the Valkyries female-fronted metal festival in St. Paul, MN under their original name, The Ottoman Empire.

In 2008, the band self-released an EP, The Answer: Does Not Exist. That same year, the band changed their name to Luna Mortis and signed a recording contract with Century Media. On February 10, 2009, the band released their debut for Century Media, The Absence, which was recorded in 2008 at the Audio Hammer Studios and produced by Jason Suecof.

In June 2009, the band returned to St. Paul (now as Luna Mortis) for the festival's third installment. Luna Mortis was dropped by Century Media Records in December 2009.

On February 15, 2010, Brian Koenig announced on Luna Mortis' MySpace page that the band had been dissolved and the members would be going their separate ways. On February 11, 2013, The band announced through their Facebook profile that the band would be reuniting in 2013, planning festival appearances and new material. However, after only two shows as a reunited band, the members decided once again to part ways.

In 2015, vocalist Mary Zimmer joined the band White Empress, a new project created by former Cradle of Filth guitarist Paul Allender. Around the same time, guitarist Brian Koenig joined the band Lords of the Trident. Mary later became the singer for a band called Santa Marta.