Oil on canvas, 50 × 50" (127 × 127 cm). [[Piet Mondrian|Mondrian]]'s late masterpiece, inspired by [[Manhattan]]'s grid and [[Boogie-Woogie|boogie-woogie]] music, replaces his signature black lines with vibrant blocks of yellow, red, blue, and gray — a joyful departure within his [[Neoplasticism]] practice.