Vivaldi supposedly wrote around 20 “sinfonias” (little symphonies, used as interludes), and last night I posted one.
Here is another one, his second one in “B minor”, that sounds less Vivaldi-ish and more similar in some ways to a later composer, and carries the additional title “Al Santo Sepolcro” which Google tells me means “The Holy Sepulchre”, which probably explains the more solemn feeling: