Historical clue formulations

• Followers of the largest denomination of Islam — 2022-04-21
• Serbian city where Constantine the Great was born — 2010-12-31
• "___ for Noose" (Sue Grafton book) — 2008-02-27
• Onetime Serbian capital — 2008-01-25
• Grafton's "___ for Noose" — 2007-12-26
• "___ for nest" — 2007-08-23
• Former 64-Across capital — 2006-06-20
• Serbian city, birthplace of Constantine the Great — 2006-04-09
• Old Serbian capital — 2005-06-18
• Former Serbian capital — 1998-10-30
• Former Serbian capital — 1997-04-19
• Constantine the Great's birthplace — 1994-08-27