Dark Ages
The Dark Ages, or Middle Ages, was a period in Human history known for its barbaric medievalism. This was a period of great darkness, a time when Humanity was beginning to "lose their way", being confronted with wars and plagues. It was followed by a period known as the Renaissance. ()

In 1986, when Doctor Leonard McCoy encountered a hospital patient that was going to receive a kidney dialysis, he was shocked that they were still doing that in the 20th century. He then said "What is this, the Dark Ages?" ()

When the landing party of the  visited the Guardian of Forever, the Guardian showed them many eras of Earth's history, including the Dark Ages. ()

In 3189, while talking with Fleet Admiral Charles Vance, Captain Saru told him about the Renaissance artist named , whose paintings brought forth a new era in Human history, thereby ending the Dark Ages. ()

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Historical eras