REMOVE

1. studies (visual works)
2. paintings (visual works)

WHAT

1. acrylic paintings (1)
2. drawings (1)
3. oil paintings (1)

WHERE

1. Cologne, Germany (1)
2. France (nation) (1)
3. Germany (nation) (1)
4. Museum Ludwig (1)
5. Musée Picasso, Paris (1)

WHO

1. Lichtenstein, Roy (1)
2. Picasso, Pablo (1)

WHEN

1. 20th century (1)
2. Pop (1)