On the off chance you have not been keeping track of how many episodes of Music for a While I have done, I’m here to tell you: The latest episode is No. 100. So my theme is centennial, so to speak. Find the episode here.

You know the hymn known as “Old Hundredth”? I have that in two versions: one by Bach, the other by Vaughan Williams, written about 225 years later — for the coronation of Queen Elizabeth II.

Haydn wrote 104 symphonies — so, naturally, I have his 100th (which has a nickname: “Military”). I also look into the Op. 100 of various composers.

What is Beethoven’s? Well, nothing major — not a piano sonata or a string quartet or anything like that. It’s a modest little song: “Merkenstein.” As I remark in the podcast, not everything can be the Fifth Symphony.

But, as luck would have it, Prokofiev’s Op. 100 is his Symphony No. 5 — a humdinger. Cracked and brilliant.

I have Brahms, Schumann, Dvořák, Shostakovich . . .

Shostakovich was one of the great musical ecumenists of all time. “I love all music, from Bach to Offenbach,” he once quipped. He composed a wild range of music, not excluding circus music (to go with transcendent string quartets and so on). You know what his Op. 100 is? His group of Spanish songs. Yes, Shostakovich wrote Spanish songs, in the middle of the Soviet Union (or in Moscow at any rate).

Again, my new Music for a While is here. Journalists often look for “hooks.” My hook in this case is the number 100. For the next episode, I don’t have a hook, unless there is an interesting soundtrack to the Dalmatians movie.