 The region was known for its wine . Since the 15th century the local inhabitants practiced viticulture and the wine producers formed St. Paul Vintners ' Guild in 1447 , the oldest such guild in the German @-@ speaking world . Terraced vineyards extended up the sides of the Krems River until it became a mountain stream and terrain was unsuitable for cultivation . The Loiben plain supported both viticulture and agriculture . As the terrain became steeper , the vines grew in terraces built from the dark Urgestein , primordial rock . From Dürenstein to Krems the river makes its wide curve ; the mountains and the steeply terraced slopes prevent clear line @-@ of @-@ sight between the two towns . 
 The region was known for its wine . Since the 15th century the local inhabitants practiced viticulture and the wine producers formed St. Paul Vintners <a href='null_genetive' title='1'><mark>'</mark></a>Guild in 1447 , the oldest such guild in the German @-@ speaking world . Terraced vineyards extended up the sides of the Krems River until it became a mountain stream and terrain was unsuitable for cultivation . The Loiben plain supported both viticulture and agriculture . As the terrain became steeper , the vines grew in terraces built from the dark Urgestein , primordial rock . From Dürenstein to Krems the river <a href='uninflect' title='2'><mark>makes</mark></a> its wide curve ; the mountains and the steeply terraced slopes prevent clear line @-@ of @-@ sight between the two towns . 
The region was known for its wine . Since the 15th century the local inhabitants practiced viticulture and the wine producers formed St. Paul Vintners  Guild in 1447 , the oldest such guild in the German @-@ speaking world . Terraced vineyards extended up the sides of the Krems River til it became a mountain stream and terrain was unsuitable for cultivation . The Loiben plain supported both viticulture and agriculture . As the terrain became steeper , the vines grew in terraces built from the dark Urgestein , primordial rock . From Dürenstein to Krems da river make its wide curve ; the mountains and the steeply terraced slopes prevent clear line @-@ of @-@ sight between tdatwo towns .