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.
Ausblhungen. Mineralische Ausblhungen auf verputztem Mauerwerk Primary Efflorescence on Masonry Wall own User Mattes Wall deteriorations Efflorescence Primary efflorescence Taken with Panasonic Lumix DMCLC Work by Mattes User Mattes
Page 2023 Free-images.com. All images are Public Domain