Introit for the 2nd Sunday in Lent

A couple of days ago, I wrote a short piece for the organ on the Gregorian chant tune "Populus Sion" which is designed for the 2nd Sunday in Lent. The style of the piece reminds of some of the 20th century French organ composers because of use of major and minor root position chords and inversions of the D7 chord.

In sections with pedals, I use three-note chords and the rest of the piece is full of seventh-chords and their inversions. Here is the PDF file if you would like to play it.