Ottonian Architecture evolved during the reign of Emperor Otto the Great (936-975). The style was found in Germany and lasted from the mid 10th century until the mid 11th century. Examples include the churches; Ste. Gertrude, Nivelles 1046 (Belgium), St. Michael 1010-33 (Hildesheim) and the Abbey Church of Gernrode, 959-63. The Abbey Church of Gernrode was appearantly the first in Europe to have the tribune gallery.
The Ottonian rulers are also regarded as the first dynasty of the Holy Roman Empire, as successors of the Carolingian dynasty and Charlemagne, who is commonly viewed as the original founder of a new (Frankish) Roman Empire.
Under the reign of the Ottonian rulers, the kingdom of the Eastern Franks finally became Germany with the conclusion of the unification of the duchies of Lorraine, Saxony, Franconia, Swabia, Thuringia and Bavaria into one empire.
After the extinction of the Ottonian dynasty with the death of Henry II, Holy Roman Emperor in 1024 the crown passed to the Salian dynasty.