This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Cong Cem DC Old QR. en QR code on cenotaph in the Congressional Cemetery in Washington DC National Historic Landmark This code simple inexpensive xeroxed laminated piece of paper has been outside for about nine months and still works It is by far the worst example of the QR codes placed outside in the Cemetery which have gone through