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Cleaning artwork at the Old Masters Picture Gallery

Jens Meyer / AP

The backside of Giorgione´s "Sleeping Venus" is vacuumed at the Old Masters Picture Gallery in Dresden, Germany, on Wednesday, Jan. 19. After an extensive cleaning, the museum will re-open to the public on Jan. 22.

Matthias Hiekel / AFP - Getty Images

Experts clean a picture frame at the Old Masters Picture Gallery on Wednesday.

Jens Meyer / AP

Raphael´s "Sistine Madonna" is cleaned in Dresden, Germany on Wednesday, Jan. 19.

Intriguingly, while browsing for more information on the gallery, we learned all the rooms of the museum have been reconstructed true to scale on the "Dresden Gallery Island" in Second Life, and all 750 masterpieces in the permanent exhibition are on display.