Mont Blanc (French for white mountain) or Monte Bianco (Italian, same meaning), also known as "La Dame Blanche" (French, the white lady) is a mountain in the Alps. With its 4,810 m summit, it is the highest mountain in the Alps and Western Europe.The mountain lies between the regions of Aosta Valley, Italy, and Haute-Savoie, France. The location of the summit itself is a subject of controversy between the two countries, as each tends to place it within its own boundaries on maps.