Why is "the faerie queene" called a romantic epic?

Spenser chose to set his epic in a romanticized medieval fantasy world full of knights, monsters, and damsels in distress. He uses this environment to give power to his allegorical statements, but at the same time, he includes an undercurrent of criticism for feudal Britain (and the class system his own age had inherited from it). Along with virtuous knights, Spenser includes noble savages (the Savage Man), honorable squires (Tristram), and even battle-hardened women (Britomart and Radigund). The knights, who are supposed to be the ideal of virtue, are often the most wrong-headed characters in the epic.