Historical clue formulations

• Big wheels in the Vatican? — 2025-12-11
• Vehicle with Vatican City registration plates — 2021-08-24
• Car with a bubble — 2018-04-17
• The first one was a modified Ford D-Series truck — 2017-01-13
• Widely used term declared "undignified" by John Paul II — 2012-11-25
• Holy roller? — 2001-02-03