Tuesdays - dedicated to the honour of the Holy Apostles

From the Catholic Encyclopedia- Apostles:

I. on the name 'Apostle';
II. on its various meanings;
III. on the origin of the Apostolate;
IV. on the office of the Apostles and the conditions required in them;
V. on the authority and the prerogatives of the Apostles;
VI. on the relation of the Apostolate to the office of bishop;
VII. on the origin of the feasts of the Apostles.