File:Heike Kamerlingh Onnes - 28 - Visit of commissioners to the ruins at the Steenschuur, Leiden, the day after the explosion of the gunpowder on January 12, 1807.png
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Heike_Kamerlingh_Onnes_-_28_-_Visit_of_commissioners_to_the_ruins_at_the_Steenschuur,_Leiden,_the_day_after_the_explosion_of_the_gunpowder_on_January_12,_1807.png (400 × 257 pixels, file size: 78 KB, MIME type: image/png)