Small Fort of the ancient Smederevo Fortress is a perfectly acoustic space for music concerts, like this one at the jazz festival “Music Fortress”:

You can see more photos from the concert here:

https://steemit.com/photography/@lighteye/sounds-of-the-balkans-at-the-music-fortress-eng-srp-zvuci-balkana-u-tvrdjavi-muzike

Soon there will be reports from a three more concerts during the festival, and you may hear a bit of sound catched with my Fujifilm X-T20 here:

https://steemit.com/dtube/@lighteye/y1cvxfli3l2

If you want to see more of the Fortress and to know another bit of history of this space, you can find it here:

https://steemit.com/history/@lighteye/the-oldest-calendar-in-the-world

…and here:

https://steemit.com/travel/@ladysnowhite/world-championship-battle-of-the-nations-2019-medieval-tournament-in-smederevo-fortress