Opposed animals are used in Insular art, the style of which is derived from a mixture of Celtic and northern European design traditions. Confronted animals, or animals intertwined in very intricate patterns, often depicted grabbing at each other to form the "gripping beast" pattern, are a main feature of some periods of Viking art. So intertwined are the animals, they are dissolved into pure ornament, and the individuals are barely discernable from each other. Confronted animals are also frequently seen in European Romanesque art, for example as decorative patterns in Romanesque architecture.