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The image shows a sign with a portrait of Leonhard Euler and a grid of numbers. The sign is likely located outdoors, as evidenced by the lighting and the blurry background of foliage and paving stones. The text on the sign is in Russian and refers to a "Magic Square of Euler" and its mathematical properties. The grid contains numbers from 1 to 25, arranged in a way that the sum of numbers in each row, column, and diagonal is 65. The portrait of Euler is a classical depiction, showing him from the shoulders up, wearing a wig and formal attire. The sign appears to be part of an informational display or exhibit. There is a metallic screw visible on the left side of the sign, suggesting it is mounted on a surface. The overall scene is well-lit, suggesting it was taken during daylight. The sign is positioned at a height that would be accessible to pedestrians. There is no indication of the specific location in Saint Petersburg, Russia, beyond the presence of the Euler square, which is a mathematical concept.
Natali Novak

Jul 1, 2026

Saint Petersburg, Russia

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The image shows a sign with a portrait of Leonhard Euler and a grid of numbers. The sign is likely located outdoors, as evidenced by the lighting and the blurry background of foliage and paving stones. The text on the sign is in Russian and refers to a "Magic Square of Euler" and its mathematical properties. The grid contains numbers from 1 to 25, arranged in a way that the sum of numbers in each row, column, and diagonal is 65. The portrait of Euler is a classical depiction, showing him from the shoulders up, wearing a wig and formal attire. The sign appears to be part of an informational display or exhibit. There is a metallic screw visible on the left side of the sign, suggesting it is mounted on a surface. The overall scene is well-lit, suggesting it was taken during daylight. The sign is positioned at a height that would be accessible to pedestrians. There is no indication of the specific location in Saint Petersburg, Russia, beyond the presence of the Euler square, which is a mathematical concept.

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Natali Novak

Jul 1, 2026

Saint Petersburg, Russia

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