Answer: The proclamation of the dogma of the Immaculate Conception by Pope Pius IX (1846-78) took place in St Peter's Basilica on December 8, 1854. Immediately, the pope decided to immortalize the event with a series of grand frescoes. The frescoes (1856-65) in the Hall of the Immaculate Conception were executed by Francesco Podesti (1800-95), who had been present at the proclamation. The fresco of the Proclamation of the Dogma of the Immaculate Conception occupies an entire wall in the room.

Numerous restorations of the Hall of the Immaculate Conception took place since the 19th century. The most recent restoration was completed at the Vatican Museum in 2007 after more than one year of work.

CLICK HERE to view a 2-minute video about
'The Story of the Immaculate Conception Reflected in Vatican Museum Frescoes'
on YouTube.com

HALL OF THE IMMACULATE CONCEPTION POSTCARDS
(Frescos Located in the Hall of the Immaculate Conception)

Restoration of the Hall of the Dogma of the Immaculate Conception
Angels Drive Out the Heresiarchs
Swiss Guard

Figure of a Commoner
Proclamation of the Dogma of the Immaculate Conception by Pope Pius IX
P185-P188 (2011)