
Question: "How exclusive is the structure?"

Context: "In 2014, work was completed on the stations historic entrance. Glazing was placed over the historic arches and the Victorian architecture was enhanced; transforming the 19th century public portico. The station is one of only six Grade One listed railway stations in the UK. Opened in 1850 by Queen Victoria, it was the first covered railway station in the world and was much copied across the UK. It has a neoclassical façade, originally designed by the architect John Dobson, and was constructed in collaboration with Robert Stephenson. The station sightlines towards the Castle Keep, whilst showcasing the curvature of the station’s arched roof. The first services were operated by the North Eastern Railway company. The city's other mainline station, Manors, is to the east of the city centre."

Answer:


one of only six Grade One
