Old, ghostly songs. Unknown artist even, maybe?

I want a list of really, really like... Ancient-ish songs, with a really eerie tone to them. You know? All the ones with strange legends behind them, the ones that were written so long ago, no one can remember who wrote them. The ones that are supposedly affiliated with ghosts, or heavy spiritual activity. Even things associated with murder or suicide from long ago.

Or at least something quite close to this.

:]