Click on the below links to view extensive lists of Catholic doctrine in historical Church writings,
from the sub-apostolic period (late-1st to early-2nd century) down to our own time, without skipping a century. ...
THE HOLY TRINITY
APOSTOLIC TRADITION
THE PRIMACY OF THE CHURCH OF ROME
HOW WE ARE SAVED
BAPTISM
CONFIRMATION
THE HOLY EUCHARIST
PENANCE
ANOINTING OF THE SICK
HOLY MATRIMONY
HOLY ORDERS
PURGATORY
THE COMMUNION OF THE SAINTS
THE BLESSED VIRGIN MARY
More about Catholic doctrine in the historical Church writings.
Check out the amazing "FIRST TWENTY-ONE CENTURIES" timeline of Church history!