In Roman Catholic usage, when commonly called an ambry, it is traditionally located in the sanctuary (as in, the altar area) of a church or in the Baptistery, and is used for the storage of the oils used in sacraments: Oil of catechumens (indicated by the Latin letters O.C.), Oil of the Sick (O.I.), and Sacred Chrism (S.C.).
On Maundy Thursday, bishops were to consecrate oil (chrism) during a special mass, with which all the parishes in their diocese were to be supplied;
The Holy Ampulla or Holy Ampoule (Sainte Ampoule in French) was a glass vial which, from its first recorded use by Pope Innocent II for the anointing of Louis VII in 1131 to the coronation of Louis XVI in 1774, held the chrism or anointing oil for the coronation of the kings of France.
Holding that the Roman Catholic church has no authority to ordain women, Pope Benedict XVI reaffirmed the church's ban on women priests at the Vatican's 2012 Holy Thursday chrism Mass.