How Vodka is Made

Was reading this about Stolichnaya Vodka. Interesting…

"Stolichnaya vodka starts with wheat and rye grains. Artesial well water is added to these grains to begin the fermentation which takes about 60 hours. Once fermentation is complete the resulting liquid is distilled four times to a strength of 96.4% ABV. This spirit is then diluted to bottling strength with more artesial well water which ultimately gives the vodka its smoothness. It is then filtered through quartz sand, activated charcoal, and finally through woven cloth"

And i always thought it was fermented potatos? Wierd