Scandinavian Peninsula
The largest peninsula in Europe, the Scandinavian Peninsula is approximately 1,850 kilometers (1,150 mi) long with a width varying approximately from 370 to 805 kilometers (230 to 500 miles).
A nations power based on wealth is called is usually referred to as GDP, or "Gross Domestic Product" (if I'm understanding the question correctly. Although this isn't always a great indicator of the fundamental "health" of the country.<span />
It convinced cubists that new art styles were needed to depict the modern world.