The expression "low-arched hall" typically refers to a space characterized by a ceiling that is not very high and features arches that are relatively low. This architectural style often evokes a sense of intimacy and warmth, contrasting with grand, vaulted spaces. Such halls are commonly found in historical buildings, including castles or churches, and can create a cozy yet majestic atmosphere. The reference may also suggest a specific aesthetic or mood within a narrative or setting.