Singer Nicole Bogner, 27, who fronted the Austrian symphonic metal band Visions of Atlantis from 2000 to 2005 has passed away after a battle with a "severe disease over a long period of time." She handled vocal duties on the band's first two albums, 'Eternal Endless Infinity' and 'Cast Away.'

Bogner possessed a haunting yet beautiful voice which you would expect to hear within the cast of an opera. She lent her talents alongside additional vocalist Mario Plank, creating a memorable and unique duo.

Visions of Atlantis posted the following message on their official Facebook page, mourning the loss of their former frontwoman:

In deep mourning and with highest respect we have to notify all Visions of Atlantis fans that our former female Singer Nicole Bogner has passed away at the age of 27 after fighting a severe disease over a long period of time. The band is shocked about the loss of an old VoA-family member but wants to express sincere gratitude to Nicole not only for 5 years of sharing a musical Vision but also for more than a decade of friendship inside and outside of Visions of Atlantis. Without Nicole Visions of Atlantis would have never been born and her unique voice and personality were a big part of VoA. With Nicole a great part of Visions of Atlantis died as well. We will always treasure your warm hearted soul, you will never be forgotten Nici.

Visions of Atlantics released their fourth album 'Delta' last year on Napalm Records and were set to enter the studio this month to record their fifth disc.

Watch Visions of Atlantis play 'The Quest' Live with Nicole Bogner