I want to know the answer to the following question:
It was in commemoration of the tenth anniversary of what?
All the background I'm provided with is that "At the funeral of the tenor Adolphe Nourrit in Paris in 1839, Chopin made a rare appearance at the organ, playing a transcription of Franz Schubert's lied Die Gestirne.". Is that enough to answer the question?
Answer: no