Which style of beer is known for its combination of burnt character and high gravity levels due to its origins in the export to Russia?

The style of beer known for its combination of burnt character and high gravity levels, particularly associated with its origins in export to Russia, is Russian Imperial Stout. This style originated in the 18th century when English brewers produced strong, dark ales that were shipped to the court of Catherine the Great of Russia. The high alcohol content, often over 8%, was intended to preserve the beer during the long journey. Russian Imperial Stouts are characterized by their rich flavors, which include roasted malt, dark chocolate, coffee, and sometimes notes of dark fruits. The "burnt" character referred to in the question comes from the heavy roasting of the malt, which contributes to the beer's complex flavor profile.

While other styles like Baltic Porter, Old Ale, and Scotch Ale have their unique characteristics and histories, they do not specifically embody the strong, roasted qualities and the notable historical context linked to the exportation to Russia that define the Russian Imperial Stout.