Located well above the Arctic Circle, the site includes the mountainous Wrangel Island (7,608 km2), Herald Island (11 km2) and surrounding waters. Wrangel was not glaciated during the Quaternary Ice Age, resulting in exceptionally high levels of biodiversity for this region. The island boasts the world’s largest population of Pacific walrus and the highest density of ancestral polar bear dens. It is a major feeding ground for the grey whale migrating from Mexico and the northernmost nesting ground for 100 migratory bird species, many endangered. Currently, 417 species and subspecies of vascular plants have been identified on the island, double that of any other Arctic tundra territory of comparable size and more than any other Arctic island. Some species are derivative of widespread continental forms, others are the result of recent hybridization, and 23 are endemic.
A masterpiece of Baroque theatre architecture, built between 1745 and 1750, the Opera House is the only entirely preserved example of its type where an audience of 500 can experience Baroque court opera culture and acoustics authentically, as its auditorium retains its original materials, i.e. wood and canvas. Commissioned by Margravine Wilhelmine, wife of Frederick, Margrave of Brandenburg–Bayreuth, it was designed by the renowned theatre architect Giuseppe Galli Bibiena. As a court opera house in a public space, it foreshadowed the large public theatres of the 19th century. The highly decorated theatre’s tiered loge structure of wood with illusionistic painted canvas represents the ephemeral ceremonial architectural tradition that was employed in pageants and celebrations for princely self-representation.
The 18th century Margravial Opera House in Bayreuth is a masterwork of Baroque theatre architecture, commissioned by Margravine Wilhelmine of Brandenburg as a venue for opera seria over which the princely couple ceremonially presided. The bell-shaped auditorium of tiered loges built of wood and lined with decoratively painted canvas was designed by the then leading European theatre architect Giuseppe Galli Bibiena.
The sandstone façade designed by court architect Joseph Saint Pierre provides a focal point within the urban public space that was particularly planned for the building. As an independent court opera house rather than part of a palace complex, it marks a key point in opera house design, foreshadowing the large public theatres of the 19th century. Today it survives as the only entirely preserved example of court opera house architecture where Baroque court opera culture and acoustics can be authentically experienced. The attributes carrying Outstanding Universal Value are its location in the original 18th century public urban space; the 18th century Baroque façade; the original 18th century roof structure spanning 25 metres; the internal layout and design of the ceremonial foyer, tiered loge theatre and stage area including all existing original materials and decoration.