Short answers, pulled from the story.
The plaster cast of David at the Victoria and Albert Museum possesses a detachable fig leaf created in response to Queen Victoria's shock upon first viewing the statue's nudity. This accessory was hung on the figure prior to royal visits using two strategically placed hooks to cover the statue's genitals.
The Athenian state brought charges against Socrates in 399 BC that would ultimately lead to his death. Plato recorded the conviction where Socrates was found guilty of corrupting the minds of the youth of Athens and of impiety known as asebeia.
The Soviet Union employed 70,000 censors to review information before it was disseminated by publishing houses, editorial offices, and broadcasting studios. This agency handled censorship matters arising from domestic writings of just about any kind including beer and vodka labels.
In 2013 Harvard political science professor Gary King led a study to determine what caused social media posts to be censored and found that posts mentioning collective action were more likely to be deleted. Posts that challenge the Party's political leading role in the Chinese government are more likely to be censored due to the challenges they pose to the Chinese Communist Party.
The Nazi book burning in Berlin took place on the 10th of May 1933 where books were publicly destroyed to enforce ideological conformity. The Nazis required that art be used as a political instrument to control people and failure to act in accordance with the censors was punishable by law.
A report of research conducted in 2007 and published in 2009 by the Beckman Center for Internet and Society at Harvard University stated that less than two percent of all filtered Internet users use circumvention tools. This finding highlights that blocking remains an effective means of limiting access to sensitive information for most users when censors are able to devote significant resources to building and maintaining a comprehensive censorship system.