As with any list of the "most beautiful" art pieces, this will be subjective and vary from person to person. However, here is a list of five art pieces that are widely considered to be beautiful:

• 1. "The Sistine Chapel Ceiling" by Michelangelo - This magnificent fresco covers the ceiling of the Sistine Chapel and is considered one of the greatest masterpieces of Western art.
• 2. "The Starry Night" by Vincent van Gogh - This iconic painting is widely considered to be one of the greatest masterpieces of post-Impressionist art, and features a stunning array of stars, planets, and a dreamlike night sky.
• 3. "The Kiss" by Gustav Klimt - This painting depicts two lovers locked in a passionate embrace and is considered a masterpiece of the Art Nouveau movement.
• 4. "The Persistence of Memory" by Salvador Dali - This painting is considered one of the most famous works of Surrealism, and features melting clocks set in a dreamlike landscape.
• 5. "The Dance" by Henri Matisse - This painting is considered one of the greatest masterpieces of Fauvism, and features a stunning array of colors and movement.

It is important to note that the beauty of these pieces is largely subjective, and that the works listed here are considered beautiful due to a combination of factors, including composition, technique, subject matter, and cultural significance.