title: Sporthotel Pontresina
context: The history of the hotel goes back to the boom in Swiss tourism during the second half of the nineteenth century. The founder of the hotel, Florian Stoppany, who came from a family of bakers and confectioners, acquired the "Maison Stiffler", a village guest house, and employed the architect Jakob Ragaz to expand it into the mid-sized Post Hotel Pontresina, which opened in 1881. The further expansion to a first class renaissance revival hotel took place in 1895.[4]   From now on the clientele of what was now known as the Hotel Pontresina came increasingly from the German upper middle class. Following the installation of central heating, in 1906/07, for the first time, the hotel opened for a winter season.
question: Who designed the Sporthotel Pontresina?
answers: Jakob Ragaz