Between the moon landing in 1969 and the growth of the science fiction genre, most would likely peg the 20th century as the origin of humanity’s interest in extraterrestrial life. Think about it: is there anything more “modern” sounding than the idea of aliens?

In actuality, this may not be the case. There are a number of historical paintings that some claim feature alien contact —we’re talking about UFOs, people! Here are 20 works of art — painted centuries before we ever went to space — that are so out of this world they might be proof of alien existence!

1. St. John the Baptist (1513 – 1516): Leonardo Da Vinci is known for leaving hidden codes in his work. Well, if you join two mirror images of this painting, the face of an alien figure can be seen. Was he trying to send us a message?

Leonardo da Vinci

2. “Charama, India, Cave Paintings” (8,000 B.C.): Archaeologists have discovered alien-like paintings inside an Indian cave. Scientists have gone straight to NASA to investigate whether or not these paintings prove aliens visited our planet 10,000 years ago.

Times of India

3. “Two Dutch Ships” (unknown): Although the artist and era of this painting are unknown, it can be seen that two Dutch ships are sailing towards floating orbs in the sky. Upon further inspection, there appear to be faces inside the orbs suggesting that this is a UFO sighting.

4. UFO sighting outside Windsor Castle (1783): This painting depicts Thomas Sandby’s account of a pale blue object entering the night sky from beyond. He recounted that the glowing orb came to a halt and moved directions at one point during the encounter.

Thomas Sandby

5. Mayan carving (1st Century): Carved in stone, there is a man worshiping or surrendering to an alien-type figure hovering above. Some suggest the UFO carving is really just a representation of an ancient Mayan god, but the extraterrestrial reference is strong.

6. The Annunciation With Saint Emidus (1486): Painted by Carlo Crivelli, this work depicts the Virgin Mary just before she learns she is going to give birth to Jesus Christ. The light beaming down on her is either the halo of the Lord… or it’s a UFO and a sign that Mary was abducted, depending on who you ask.

Carlo Crivelli

7. The Crucifixion Of Christ (1350): This painting, which hangs above the Visoki Decani Monastery in Kosovo, depicts the crucifixion of Christ. Supposedly, the objects in the upper corners are some sort of spacecraft!

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8. The Baptism Of Christ (1710): Showing the baptism of Jesus, this painting by Aert de Gelder features four separate beams of light. Some believe this demonstrates that the disc in the sky is actually a UFO.

Aert de Gelde

9. The Madonna With Saint Giovannino (late 1400s): Domenico Ghirlandaio painted an object over the Madonna’s left believed by some to be a UFO. A man is staring at it in the distance and a dog seems to be barking at it as well.

Domenico Ghirlandaio

10. Triumph Of Summer Tapestry (1538): This tapestry was created in Bruges, Belgium, and features depictions of three strange objects in the sky. They don’t seem to match any known religious symbols, and the scene on the tapestry is of a ruler’s rise to power.

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11. La Tebaide (mid-1400s): This painting shows a number of scenes from monastic life in the 15th century, as well as the Crucifixion. Some point to the red disc at the bottom as a sign of something alien, but debunkers say it’s nothing but the hat style commonly worn by cardinals at the time.

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12. The Miracle Of The Snow (1428-1432): Painted by Masolino da Panicale, it evidently shows a snowfall that happened on a hot August day in Italy. Many believe the clouds might really be representative of something far more otherworldly.

Masolino da Panicale

13. “Israel, Put Your Hope In The Lord” Painting (circa 1600s): Residing now in the Church of the Dominican Monastery in Sighisoara, Romania, this eerie painting shows a church on fire. Above it appears to be some sort of UFO wreaking havoc.

14. Glorification Of The Eucharist (early 1600s): Painted by Ventura Salimbeni, it’s hard not to notice the globe in the middle of the work. Some say it’s evidence of time travel, while experts suggest it’s a “creation globe,” and the antennas are actually wands used by God and Jesus.

Ventura Salimbeni

15. The Crucifixion Of Christ (circa 1600s): Found in the Svetishoveli Cathedral in Mtskheta, Georgia, this painting apparently shows two flying objects on either side of Christ during the Crucifixion. Some believe this is proof that Jesus was some form of human-alien hybrid.

The Crucifixion Of Christ

16. Saint Wolfgang and the Devil (circa 1475): This piece by Michael Pacher shows Saint Wolfgang himself getting help from some devilish alien creature to build his church.

Michael Pacher

17. Egyptian Pictograph (400 B.C.): This pictograph appears to show a male Egyptian offering a live bird to a cloaked alien figure of some sort. Potentially a peace offering after unwanted aliens invaded earth?

18. “Une No Chiri” (1803): Published in a book in the 19th century, this illustration depicts a real-life artifact that was found at Haratonohama by Japanese sailors. According to the explanation on the drawing, the outside was made of iron and glass.

Ume No Chiri

19. Foppa Adorazione (1478): This painting has a hidden message lurking in the back. A man can be seen standing on the hill looking up at a glowing orb. Some argue that this divine painting depicts belief of extraterrestrial life.

Vincenzo Foppa

20. Mona Lisa (1503) Another example of Leonardo da Vinci leaving hidden messages in his work, comes from one of his most famous paintings. If you place two mirror images of the Mona Lisa side-by-side, an alien’s face becomes clearly visible.

Leonardo da Vinci