From the Swiss National Library [Bibliothèque nationale suisse (BN)]
Note: Below from a Google Translation of Announcement:
Swiss fops [“Les petits-maîtres suisses”; 18th-century artists who concentrated on drawing rather than painting.” *] exercised their art from the mid-18th and mid-19th century. They have shown the landscapes and everyday scenes features in pencil, watercolor and oil. Production gives a rich overview of landscapes and old Swiss culture.
The 1000 images are royalty-free and also available on OpenData.ch
Direct to Uploaded Images (via Wikimedia Commons)
* Sentence from OxfordDictionaries.com
Hat Tip and Thanks: @Boosda