Ensemble Inégal are performing Zelenka's 1718 Litanie di Virgine Maria (ZWV 149) and Missa Sancti Spiritus (ZWV4) in Kostel U Salvátora, Prague. Details here:
Here it is revealed that the world premiere piece is ZWV 149
You can see the autograph manuscript score for ZWV 149 here: https://digital.slub-dresden.de/werkansicht/dlf/32453/1/ or here on imslp for easier viewing
Exciting to see a 'new' Zelenka piece being performed. Plus, the wonderful Missa Sancti Spiritus, which is truly magnificent and I hope will be recorded for CD some day (it was performed at Zelenka festival 2018 and it knocked my socks off).