Has a real dinosaur egg ever been found?

Has anyone ever actually discovered a genuine dinosaur egg in the wild or through excavation? It's a fascinating question that has captivated paleontologists and enthusiasts alike. With the numerous discoveries of dinosaur bones and fossils over the years, have there been any instances where a fossilized egg belonging to one of these ancient creatures has been unearthed? And if so, what insights have these findings provided into the reproductive habits and biology of dinosaurs?