July 4, 2017

In 1926, a Polish citizen named Leopold Kotnowski came to the White House with a huge greeting card for the United States’ 150th birthday.
The birthday card contained 5.5 million signatures, artwork, photographs, poems, and pressed flowers.

Photo credits: Katherine Frey / The Washington Post

https://www.sunnyskyz.com/blog/2199/Poland-Sent-The-U-S-A-Birthday-Card-With-5-5-Million-Signatures