Who was the longest-reigning monarch in Europe? Queen Elizabeth II King Felipe VI King Harald V Queen Victoria III None Which European royal house ruled over a vast empire including territories in Africa, Asia, and the Americas? House of Windsor House of Bourbon House of Habsburg House of Romanov None Who was the last Tsar of Russia? Nicholas I Alexander III Nicholas II Peter III None Which queen has been called "the grandmother of Europe"? Queen Victoria Queen Elizabeth I Queen Isabella I Queen Anne None Who was known as the Sun King? Louis XIV Charles V Henry VIII Frederick II None Time's up