In medieval times, religion dominated all aspects of life. Artwork, stories, and beliefs were mostly religious in nature. Some common art forms included illuminated manuscripts, metalwork, painting, embroidery, mosaics, sculpture, and heraldry. King Arthur and the legend of the Knights of the Round Table were also popular subjects that incorporated ideals from the chivalric code which emphasized virtues like courage, honor, and serving others. The Catholic Church exerted strong influence over people's lives through imposing fear of hell, controlling access to heaven, and amassing wealth through tithes and taxes. Feudalism defined the social structure and political system of the time period.