Felix Mendelssohn Bartholdy Theme in E Flat, arranged by Collins Drigg. Registration can be found at the end of the piece. More pieces of Mendelssohn can be found in my playlist: https://www.youtube.com/playlist?list=PLNFZTCpjQ59WHwfcOjCHkn30gAu-RFvC1
Played on Sonarte organ with Hauptwerk, 2010 Mascioni, Alessandria, Chiesa di San Giovanni Evangelista, Italy