Historical clue formulations

• Marble marvel — 2018-01-14
• Attraction on the bank of the Yamuna River — 2017-11-24
• Landmark that exhibits 44-/46-Across — 2015-04-15
• Final resting place built in the 17th century — 2009-08-01
• Boardwalk locale — 2006-07-08
• Mogul memorial since the 1640's — 1999-08-20
• Literally, "gem of buildings" — 1995-02-03