photo

https://www.pexels.com/
Pexels provides high quality and completely free stock photos & videos licensed under the Pexels license. All photos are nicely tagged, searchable and also easy to discover through our discover pages.

https://pixabay.com/photos/ 
Pixabay is a vibrant community of creatives, sharing royalty-free images, videos, audio and other media. All content is released by Pixabay under the Content License, which makes it safe to use without asking for permission or giving credit to the artist - even for certain commercial purposes.

https://www.haltadefinizione.com/en/image-bank/
Haltadefinizione’s digital gallery is a treasury that invites its use in active teaching. Available at no cost to anyone:

• Consult the images in the digital archive for teaching and scholarship;
• Project the images freely in the classroom, share them on electronic blackboards or on any other platform used for remote teaching;
• Take screenshots and include the images in handouts, with proper citation of Haltadefinizione and the museum or gallery owning the work, found at the bottom of the image.