Religious institutions often anchored how medieval cities grew and defended themselves. In Arras, the old Roman core centers on the cathedral, giving the city a monumental nucleus and a defensible focus that shaped streets, gates, and walls. A subsequent, separate quarter forms around the monastery, creating a second, religiously anchored zone with its own defensive perimeter. This pairing shows how city form and defense were organized around dominant religious authorities—the cathedral in the old city and a new area shaped by the monastery—making it the best fit for how Arras developed.

In Serlio’s architectural writing, scenes used in decoration are a way to teach, inspire, and elevate the viewer. The tragic scene is valued most highly because it carries weight, gravity, and a sense of moral seriousness that civic spaces and grand buildings aim to convey. Tragedy through heroic or solemn subjects reinforces virtuous conduct, public memory, and the dignity of the architectural setting, making it the most fitting for monumental architecture and public discourse. Pastoral scenes tend toward rustic charm and pastoral calm, which can soften the majesty of a space. Mythological scenes are classical and impressive, but they often serve as decoration or symbolic reference rather than a direct moral or civic instruction. Comic scenes are light and entertaining but lack the solemn impact that public, monumental architecture seeks, so they occupy a lower position in Serlio’s suggested hierarchy.

Initiation of the First Crusade is the focus here. The call originated with the Catholic Church, specifically Pope Urban II, who in 1095 at Clermont urged Western Christians to take up arms to reclaim Jerusalem and to defend Christendom, offering spiritual rewards for those who joined. This papal initiative set the crusade in motion and framed it as a religious duty backed by papal authority. The other options don’t fit because they either weren’t the force behind calling a crusade at that time or didn’t exist as the initiating power. The Ottoman Empire wasn’t a factor in launching the First Crusade, and the Holy Roman Empire did not issue the call itself—though some of its princes and knights did participate under broader political and religious motives. Viking raiders had long ceased their era of expansion by this period.

Baroque urban design organizes city space around monumental, ceremonial routes and hubs. The boulevard is used to extend perspective and parade routes, the ordonnances regulate streets and façades to create unity and order, and the royal square provides a grand focal point for display of power and public ritual. The garden city doesn't fit this Baroque toolkit; it comes from later reform movements in the late 19th and early 20th centuries, emphasizing green suburbs and self-contained communities rather than Baroque-scale urban figures.