The Feast of the The Immaculate Conception of the Blessed Virgin Mary, Ist Class

Today is the Feast of the Immaculate Conception of the Great Mother of God, Mary Most Holy.

The Collect from the Roman Breviary:

O God, who in the foreknowledge of thy Son's most precious death didst consecrate for him a dwelling-place by the immaculate Conception of the Blessed Virgin : mercifully grant that she who was preserved from all defilement ; may evermore pray for us until we attain unto thee in purity of heart. Through the same.

The Proper Lessons may be found here.

The article from the Catholic Encyclopædia.

From the Golden Legend of Bl. Jacobus Voragine.

From Goffine's Devout Instructions.

From Tradition in Action.

From Medieval Saints at Yahoo!