Explanation:

The capital of Spain is Madrid. It is the largest city in Spain and serves as the political, cultural, and economic center of the country. Madrid is located in the heart of Spain, on the central plateau, and is known for its rich history, art museums such as the Prado and Reina Sofía, and vibrant nightlife. The city is also a major financial hub in Europe, hosting the headquarters of numerous Spanish companies and multinational corporations.