Maas Johannas Hell is a name synonomous with the German Holsteiner Horse.  He established the model of high performance with an emphasis on jumping . Mr. Hell was responsible for the introduction of French Anglo-Norman blood including Cor de la Bryere and Alme, which contributed significantly towards this goal. Calvaro, Cantus, Ahorn, Athlet, Acord II, Calido, Canturo, E. Montreal are a few of his exceptional bloodlines and offspring.  As Director of the Riding and Driving School of the Holsteiner Verband from 1971 - 1981 he was considered a horseman and organizer of the highest caliber. He originated the stallion exhibition at Neumunster and constructed the marketing center in Elmshorn Germany during his tenure with the Holsteiner Federation.

Some of the most important sporthorse bloodlines have come from Maas Hell Stables. Olympic medalists, World Cup contenders and International Grand Prix winners around the world are the product of generations of a carefully planned program to improve jumping ability, athleticism, speed, blood and beauty culminating in today's modern Holsteiner. Cantus (produced 25 approved sons) is the sire of Willi Melliger's Calvaro (Olympic Silver Medalist) Calido I (sire of 19 approved sons), Olympian Canturo with Bernardo Alves, Paul Schockemoele's white stallion Come On (with a 100 day dressage score of 142) and Cascavelle (sire of 155 offspring in sport). Acord II, by Ahorn Z, is acknowledged as one of the most influential modern Holsteiner sires with 38 approved sons, 38 State Premium mares, and 430 offspring in sport and is also the sire of Acorado, Ars Vivendi, and Ariadus. Ahorn Z (339 offspring in sport) is also the sire of Alasca, who has sired 6 approved sons and has 217 offspring in sport. Athlet Z has sired Acobat II (112 offspring in sport) and Athletico (182 offspring in sport) and has 368 offspring in sport with winnings of over €1.2 million in winnings.

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