Here are some places where you can find large image files of famous art available for free / public use:

* **Smithsonian Open Access** has over 4.5 million high-resolution images of artworks from the Smithsonian Institution's museums, libraries, and archives. You can download the images in JPEG, TIFF, or PNG format.
* **Europeana Collections** has over 2.2 million digitized artworks from museums and archives across Europe. You can download the images in a variety of formats, including high-resolution PNG and TIFF.
* **Museo** has over 1.9 million high-resolution images of artworks from museums and galleries around the world. You can download the images in JPEG, TIFF, or PNG format.
* **The Calisphere Collections** has over 1.4 million digitized images of artworks from museums and archives in California. You can download the images in JPEG, TIFF, or PNG format.
* **V&A Collections** has over 1.2 million high-resolution images of artworks from the Victoria and Albert Museum in London. You can download the images in JPEG, TIFF, or PNG format.
* **The British Library** has over 1 million high-resolution images of artworks from its collection. You can download the images in JPEG, TIFF, or PNG format.
* **The Metropolitan Museum of Art** has over 400,000 high-resolution images of artworks from its collection. You can download the images in JPEG format for non-commercial use.
* **The National Gallery of Art** has over 50,000 high-resolution images of artworks from its collection. You can download the images in JPEG format for non-commercial use.
* **USEUM** is a free website that allows you to download high-resolution images of artworks from museums around the world. The images are available for both commercial and non-commercial use.

When downloading images from these websites, it is important to check the licensing terms to make sure that you are allowed to use the images for the purpose you intend. Some images may only be used for educational or personal use, while others may be used for commercial purposes.

I hope this helps!
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