The Mystery of Time is the sixth full-length album by Tobias Sammet's german metal opera project Avantasia.

[5][6] The Mystery Of Time scored high positions in several international music charts and even enabled Avantasia to enter the US Billboard charts for the first time.

[7] When asked to compare the album to Avantasia's previous efforts, guitarist and producer Sascha Paeth described it as follows:[8] It is a more 'fantastic' production, based a little bit more on orchestra work and keyboards.

It's more like a film score, to underline the whole story, the rock opera aspect, which was a choice on this one and I think it works out fine.

All tracks are written by Tobias SammetThe album booklet describes the story "So take the time to follow me into a small old English town during the Victorian era and join a young agnostic scientist by the name Aaron Blackwell as he is forced to explore the coherencies of time, God and science; torn between belief in his professional conviction, his spiritual intuition, love and a lodge of scientific occultists.