And if you’re already at the Capitoline museum and looking out through the tabularium at the Forum, then you must definitely not miss one of the most special sights at the museum- the remains of the base structure of the temple of Jupiter Optimus Maximus Capitolinus (Jupiter Best & Greatest of the Capitoline). For centuries this was the most important temple in the city of Rome. Time has taken its toll alas and today what remains to be seen is just this- however the place has an aura that is unmistakably ancient and powerful.
Also do not miss viewing the equestrian statue of Marcus Aurelius- the original one- the one kept outside the museum on the piazza is a copy. Once all of Rome was decorated with huge equestrian statues. It is even estimated that there may have been more statues in Rome (of all sizes) than people. And Rome had a lot of people!