Oil painting has produced some of the most iconic works in human history. Leonardo da Vinci’s Mona Lisa is celebrated for its soft transitions and mysterious expression. Rembrandt’s portraits show masterful use of light and shadow. Vincent van Gogh’s Starry Night demonstrates expressive brushwork and emotional color. Claude Monet’s Water Lilies series captures light and atmosphere through layered oil paint. These works remind us why hand-painted oil painting remains a powerful and enduring art form.