A "sweeping staircase" refers to a grand and elegant staircase that has a curve or gentle slope, making it visually appealing and impressive. Full definition
The hotel offers 300 spacious rooms and suites, and has an impressive lobby, with highly decorative marble floors and a grand sweeping staircase. (thetravelmagazine.net)
With seating on two decks joined by a large sweeping staircase, the bar area has a real cruise ship feel. (directferries.com)
The refurbished original sweeping staircase with stained glass windows leads guests to 31 new deluxe rooms and suites that were previously meeting rooms and offices, bringing the total number of guestrooms to 205. (breakingtravelnews.com)