Most people chalk drawing simultaneously - single location

According to Official Guinness Records,

The record for the most people chalk drawing simultaneously involved 5,391 participants, in an event organised by EURÓPA Közhasznú (Hungary) in Andrassy Street, Budapest, Hungary, on 20 September 2009. The record attempt was made to raise awareness of the importance of protecting the environment.

For a complete list of 2009 records, please visit 2009 Guinness Records in Hungary.

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Other Hungary records that might interest you:

• Longest distance rowed on a Concept II Indoor Rower in 24 hours by a team (male)
• Smallest distance between airplane and motorcycle during mid-air crossing
• Longest career for a football (soccer) referee
• First artificially inseminated rhino
• Fastest aircraft speed for a mid-air transition