Le chant d’amour (Song of Love) by Giorgio de Chirico, 1914.

This painting brings together incongruous and unrelated objects: the head of a Classical Greek statue, an oversized rubber glove, a green ball, and a train shrouded in darkness, silhouetted against a bright blue sky. By subverting the logical presence of objects, de Chirico created what he termed “metaphysical” paintings, representations of what lies “beyond the physical” world. Cloaked in an atmosphere of anxiety and melancholy, de Chirico’s humanoid forms, vacuous architecture, shadowy passages, and eerily elongated streets evoke the profound absurdity of a universe torn apart by World War I. (via MOMA)

You can think of this piece as “The One That Started A Movement”. It predates the actual surrealist movement by ten years, yet it embodies almost everything the surrealists were about. The ball and the train became a recurring theme in Chirico’s other paintings.