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5/5 Why a landmark building in Oban by John Stewart McCaig never got finished.
4/5 Jonathan Glancey finds out about 17th-century plans for a sumptuous palace in Whitehall.
3/5 Why did the city fathers of Edinburgh take against Robert Adam's plans for a new street.
2/5 The story of the 19th-century plans to build a giant pyramid cemetery on Primrose Hill.
1/5 The story of Liverpool's great unbuilt Catholic cathedral, designed by Sir Edwin Lutyens.