The Norton Simon Museum is located in Pasadena, CA and is one of my favorite places. Check out https://www.nortonsimon.org/art/ The best part of this past visit was going with a guide who is an art historian, Clare Kunny. She has a company called Art Muse LA. https://www.artmusela.com/ that is made up of historians and artists who give private curated art tours in Los Angeles.
On this tour she highlighted her favorite pieces which included The Branchini Madonna by Giovanni di Paolo.
In a Villa at the Seaside by Berthe Morisot
and Still Life with Lemons by Francisco de Zurbaran.