The most difficult sculp­tures riddles

Fallen Astronaut is an 8.5-centimeter (3.3 in) aluminium sculpture created by Paul Van Hoeydonck, meant to intended to commemorate the astronauts and cosmonauts who have died in the advancement of space exploration. During the Apollo 15 mission, near the completion of his work on the lunar surface on August 1, 1971, Scott secretly placed the Fallen Astronaut on the Moon.

Giovanni Strazza (1818-1875) was an Italian sculptor who was born in Milan, Italy. He studied at Brera Academy in Milan and then worked in Rome between 1840 and 1858. He returned to Milan where he taught at his alma mater from 1860 to 1875, passing the "Sculpture Chair" to Giosuè Argenti.

Piss (Czech: Čůrající postavy) is an outdoor 2004 sculpture and fountain by Czech artist David Černý, installed outside the Franz Kafka Museum in Malá Strana, Prague, Czech Republic. The Prague Post ranked Piss number one in their article, "Top 10 strangest statues in Prague", in which Ada von Kayser described the work as "both controversial and amusing".