Photographer is Kamil Tamiola, here's the photo and his caption from his website.

"Have you ever wondered how does a mountaineer's day start? I will give you a hint: you wake up at 3 am, set the stove, wake up your partner, pretend it is warm, quickly consume a high-calorie breakfast, watch your friends slowly ascending the icy slopes of your dream summit with their tiny head torches glimmering against perfectly blue ice, and hope for the good weather. One would ask: why all this trouble? The answer is easy: for the love of the adventure and the unknown.

On this photograph, Kamil Tamiola of ALPINE PHOTOGRAPHY prepares for a long climb on the north face of Mont Blanc du Tacul."

That's almost certainly the terminal building for one of the two cable car lines that access the peak in the background on the right, and climbers with headlamps on the slope to the left.