Zum Martin Sepp is a small restaurant and inn located in Grinzing, a little town on the northern outskirts of Vienna. Michael and Freya Martin produce wine for the inn at Weingut Martinshof, their winery in the Weinvirtel. For generations, the region has supplied wine almost exclusively for the Viennese market, with little or none exported to other countries or even other parts of Austria. Michi Martin is one of the most dedicated winemakers youâ€™ll find. Michiâ€™s passion for his homelandâ€™s champion grape is boundless, and he turns that passion into some of the freshest and tastiest GrÃ¼ner around. Fresh, with clean citrus fruit and spirited acidity. Organic Practices, hand picked, hand sorting. Stainless Steel aging.