What two concrete roman building still stand today?

Two iconic Roman buildings that still stand today are the Colosseum and the Pantheon. The Colosseum, an ancient amphitheater in Rome, was used for gladiatorial contests and public spectacles, showcasing the engineering prowess of the Romans. The Pantheon, originally built as a temple to the gods, is renowned for its massive dome and oculus, and remains a significant architectural marvel. Both structures reflect the grandeur and innovation of Roman architecture.