Answer:
One artist who used over 170 sketchbooks is Leonardo da Vinci.
1. Leonardo da Vinci was a renowned Italian artist, scientist, and polymath who lived during the Renaissance period in the 15th and 16th centuries.
2. Throughout his life, Leonardo da Vinci used numerous sketchbooks to document his observations, ideas, and artistic studies.
3. These sketchbooks, known as "codices," contained a wide range of subjects, including anatomical studies, mechanical inventions, architectural designs, and artistic sketches.
4. It is estimated that Leonardo da Vinci's surviving sketchbooks comprise around 7,000 pages, which were filled with his meticulous drawings, notes, and writings.
5. His extensive use of sketchbooks demonstrates his dedication to continuous learning, exploration, and experimentation in various fields of study.
6. Leonardo da Vinci's sketchbooks are considered invaluable historical documents that provide insights into his creative process, thoughts, and innovations.
7. Some of his most famous works, such as the Vitruvian Man and The Last Supper, were influenced by the ideas and studies documented in his sketchbooks.
It is worth noting that while Leonardo da Vinci is a well-known artist who extensively used sketchbooks, there may be other artists throughout history who have also utilized a significant number of sketchbooks in their practice.