There's also the Lick Observatory's refracting telescope, still usable: https://www.lickobservatory.org/explore/36-inch-lick-refractor/ https://www.lickobserva

There's also the Lick Observatory's refracting telescope, still usable: https://www.lickobservatory.org/explore/36-inch-lick-refractor/ https://www.lickobservatory.org/explore/36-inch-lick-refract... The lens was built in France in the 1880s and transported to San Jose. I don't know about COVID closures now, but I looked through it in the early 00's.