<p>Childhood friends, <a href="https://www.nationalgeographic.com/history/world-history-magazine/article/alexander-the-great-murder-conspiracies-history">Alexander the Great</a> (right) and his general Hephaestion (center) were close companions for their whole lives. Many historians believe the two were lovers, but ended the amorous side of their relationship when it was time to marry and start a family. Hephaestion remained a trusted favorite of Alexander throughout his career. His sudden death in 324 B.C. deeply affected Alexander, who openly mourned him. They were said to look so much alike, that some couldn't tell them apart.</p>

Alexander the Great and Hephaestion

Childhood friends, Alexander the Great (right) and his general Hephaestion (center) were close companions for their whole lives. Many historians believe the two were lovers, but ended the amorous side of their relationship when it was time to marry and start a family. Hephaestion remained a trusted favorite of Alexander throughout his career. His sudden death in 324 B.C. deeply affected Alexander, who openly mourned him. They were said to look so much alike, that some couldn't tell them apart.

Ann Ronan Pictures, Print Collector/Getty

Who were history's top ten, red-hot power couples?

Harnessing their passion and ambition, these ten couples dominated their times—building empires, creating masterpieces, and breaking boundaries.

In mid-February, hearts and minds turn to love as Valentine’s Day approaches. The power of love is a glorious thing, especially when two people are able to channel their connection to reach new heights. From Caesar and Cleopatra to Frida and Diego, history’s power couples transformed their worlds as they came together and broke apart.

Read This Next

How long does COVID-19 linger in your body?
New therapies revolutionize treatment for hard-to-heal wounds
The audacious science pushing the boundaries of human touch

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet