Picture credits
The photographs on the front page, on the sign-in page and in an empty library are free to use: each is marked CC0 (no rights reserved) by its source. Credit is not required, but photographers deserve it, so it is here. No identifiable people appear in any of them.
They were found through Openverse. Pictures from StockSnap are the 600 px previews that Openverse serves, because StockSnap does not allow automated downloads of its original files.
Autumn Background
Nature's Beauty, StockSnap, CC0
Architecture Buildings
Felix Dubois-Robert, StockSnap, CC0
Flowers Nature
Clem Onojeghuo, StockSnap, CC0
Flowers in the sky
Rawpixel, CC0
Tulips Background
Travel Photographer, StockSnap, CC0
Hot air balloon sky
Rawpixel, CC0
Spin Top Red Chair
Justin Nealey, WordPress Photo Directory, CC0
White Flower
The World is a Stage, StockSnap, CC0
Cover loosely woven linen material
Rawpixel, CC0
Pink peony background
Rawpixel, CC0
Orange Tulips
Leigh Kendell, StockSnap, CC0
Sunflowers Vase
Pamela Webb, StockSnap, CC0
Hot air balloon sky photo
Rawpixel, CC0
Orange Cosmos Flower And Blue
Rawpixel, CC0
Large Sunflower
Bruce Mars, StockSnap, CC0
Hot air balloon sky
Rawpixel, CC0
Tulips Background
Travel Photographer, StockSnap, CC0
Hot air balloon sky photo
Rawpixel, CC0
Pink peonies
Rawpixel, CC0
Your own library is never shown to us. These pictures are only the examples on Musepile's own pages.