The Church of Christ "inde a tertii seculi initiis" has had her faults, many and grievous, but she never did nor shall fail in her duty as a faithful "witness and keeper of Holy Writ.
This is the book that contains the 'nuts,' and this is the kernel that goes in that particular shell or a corner of it, 'Antiquitas seculi juventus mundi.
And to speak truly [and that after all is the best way of speaking] Antiquitas seculi juventus mundi.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "seculi" in a variety of sentences. We hope that you will now be able to make sentences using this word.