My Grandpa Gave Me This Necklace With Very Old Unknown Coin

@fma, first welcome to CCF. Second, one of your pics looks quite out of focus, but this looks to be a Roman coin so I'm going to move this thread over to that subforum. We will get some good eyeballs on it there.

FYI, the Romans didn't have kings after 450BC or so. The monarchy was ended and replaced by the Republic, which lasted until 27BC when the empire is agreed to begin. After that Rome had only emperors.

Now there were openly gay emperors. Hadrian had an intense love affair with a Greek named Antinous. He even had Antinous deified after his death.
There was also Elagabalus, an emperor we would consider as gender dysphoric. Supposedly he liked to dress up as a woman and have sex with men, but some of this was likely propaganda.
He became unpopular with the people, not because of his sexuality but due to his elevation of the sun god cult from Syria over the traditional Roman gods.
He got murdered on orders of his own grandmother, who replaced him with another of her grandchildren.

In general homosexuality wasn't a big deal in Rome, as it would later become later in Europe a thousand years later.

Half? More like three-quarters. Dying of old age, at peace in bed surrounded by friends and family and with an heir and successor all lined up and patiently waiting to take their place, was a rare fate for a Roman emperor. Likewise, very few were allowed to retire to their villa. Most died by violence; they were either assassinated or were killed in battle. Kind of makes you wonder why anyone would actually want the job, yet clearly, many did.

The Empire did not become noticeably less violent after the formal adoption of Christianity, with the exception that retiring to a monastery (either voluntarily or by force) became a somewhat more common fate for emperors that were past their prime, and suicide became less common as it was frowned upon as sinful. Ritual disfigurement of rival claimants to the throne - lopping off a nose, ears or other non-essential body parts - also came into fashion in the early Byzantine period, as the state doctrine had evolved so that, as God's vice-regents on Earth, only the physically perfect could qualify to become emperor and a mutilated person was visibly imperfect.

Fascinating history, thanks all. I thought I was just going to read about a coin ID but I got way more :-)