Historical clue formulations

• Old Bulgarian rulers — 2026-08-09
• Bygone leaders — 2026-05-23
• The first of these was Terrible — 2026-04-24
• Ivan the Terrible and Peter the Great — 2026-01-27
• Peter the Great and others — 2025-09-23
• Ruling Romanovs, e.g. — 2025-08-24
• Alexis, Feodor and Peter, among others — 2025-08-08
• Line of rulers ended by the 33-Down — 2025-07-10
• Rulers used to make many crosswords? — 2024-06-30
• Peter the Great and Ivan the Terrible — 2024-03-24
• Alexanders I-III — 2023-12-03
• Peter and Alexander — 2023-09-17
• Bygone Russian rulers — 2023-08-30
• Prerevolutionary rulers — 2022-10-28
• Rulers until 1917 — 2022-06-26
• Bygone Russian rulers — 2022-03-08
• Peter the Great and others — 2021-03-14
• Ivan the Terrible and Peter the Great — 2020-05-12
• They range from terrible to great — 2020-02-21
• Bygone potentates — 2019-08-03
• Bygone autocrats — 2019-04-09
• Leaders before 41-Across — 2019-01-17
• Old Russian royals — 2018-12-10
• Line that ended with Nicholas II — 2018-11-25
• Peter and Paul — 2018-11-22
• Rulers during the Time of Troubles — 2018-09-16
• Long line in Russia — 2018-08-05
• Old Russian autocrats — 2018-06-12
• Bulgaria's Simeon I and Simeon II — 2018-05-25
• Bulgaria's Simeon I and Simeon II — 2018-01-26
• Rulers before 1917 — 2018-01-24
• Old line in Russia — 2016-10-23
• Peterhof Palace personages — 2016-05-20
• Russian line — 2016-01-17
• Old Russian rulers — 2015-11-16
• Opponents of the Reds, once — 2015-10-23
• Boris Godunov and others — 2015-09-22
• Old Russian autocrats — 2015-09-21
• Bygone royalty — 2014-09-27
• Old dynasts — 2014-04-12
• Ivan IV and V — 2013-12-03
• Several Peters — 2013-11-21
• Strongmen of old — 2013-09-21
• Line that ended in 1917 — 2013-01-24
• Bygone Russian leaders — 2013-01-08
• Old Russian leaders — 2013-01-01
• Winter Palace succession — 2012-09-15
• Old dynasty members — 2012-09-01
• Old Russian line — 2012-07-08
• "The ___ Bride" (Rimsky-Korsakov opera) — 2012-06-23