Historical tourism is in vogue. Why is that? Historian Valentin Grebner talks about the popular spots of historical tourism - and how it originated, as it was invented by entrepreneurial monks over five hundred years ago.

Grebner travels from their "Sacri Monti" in Piedmont to medieval cathedrals and the historic centers of cities, the Alps, romantic Lucerne, and picturesque Sri Lanka. He elegantly describes the allure of traveling back in time: It is the longing to find paradise, the authenticity of the past, which we must relive, perhaps even more intensely.

So welcome to the time machine and the grand bazaar of "historical identities": Please board, we are traveling in reverse!