Unless I am mistaken (in which case feel free to contact me), this is an eagle owl. The information below is found at http://en.wikipedia.org/wiki/Eurasian_Eagle_Owl

The Eagle Owl is a large and powerful bird, smaller than the Golden Eagle but larger than the Snowy Owl. It has a wingspan of up to 200 cm (5-7 feet). Adult females can weigh in excess of 4 kg (9 lb), in comparison the common Barn Owl weighs about 500 grams (1.1 lb). It mainly feeds on small mammals, but can kill prey up to the size of foxes and young deer (up to 10 kg/22 lb), if taken by surprise. Larger prey (over 3 kg/7 lb) is consumed on the ground which leaves the bird vulnerable (for example to other foxes).

The call of the Eagle Owl is a deep resonant “ooh-hu” with emphasis on the first syllable for the male, and a more high-pitched uh-Hu for the female (in German, the name of this bird is “Uhu”). Each member of an Eagle Owl population can be identified by means of its vocalizations.

The size, ear tufts and orange eyes make this a distinctive species. It has a strong direct flight. The difference between the male and female is that male’s ear tufts are more upright than the female’s.

The horned owls are a part of the larger grouping of owls known as the typical owls, Strigidae, which contains most species of owl. The other grouping is the barn owls, Tytonidae.