The St John Passion, also known as Passio secundum Joannem or Johannes-Passion, BWV 245, is a Passion oratorio completed in 1724 by German composer Johann Sebastian Bach (1865 - 1750). It is the oldest of the two surviving Passions. Compared with the St Matthew Passion, the St John Passion has been described as more extravagant, with an expressive immediacy, at times more unbridled and less "finished" (Wikipedia). General opinion (and mine as well) is that the St Matthew is overall the more impressive work, but there are so many gems in the St John as well that it fully deserves to be include in my list of favourites. The average playing time is one hour and 47 minutes (AllMusic). I have six versions of this work, with a slight preference for the one by the Amsterdam Baroque Orchestra under Ton Koopman with a selection of soloists on an Erato double CD.
