Pilgrim Street runs from the Tyne Bridge to Northumberland Street and was once part of the A1 Motorway before it was diverted away from the city centre. The lower part of the street was demolished during the construction of the Tyne Bridge in the 1920's and in the 1960's notorious local councillor T Dan Smith built Swan House, in my opinion, the worst of his many eyesores that blight the Newcastle skyline.
Pilgrim Street contains, amongst other notable buildings, Alderman Fenwick's House, Newcastle a Grade I listed early 18th century merchant’s house, the newly restored Tyneside Cinema the long abandoned Art Deco former Paramount Theatre later known as the Odeon Cinema.
Now it's probably Newcastle's most run down street although I believe plans are afoot to renovate the area.
The Pilgrim Street masterplan
East Pilgrim Street - Regeneration Opportunity Area
Three Thirties at Pilgrim St. Lots of information and a few more photos of Pilgrim Street.