On July 5, 1914, a time capsule in the form of a brick, was officially laid as part of the foundation of Sacred Heart Cathedral School.   Rector of the Cathedral was Rev. John Flannagan, who served from 1907 to 1926. 

In preparation for the 2017 All-School Sacred Heart Reunion, parishioner Patrick Costello, class of 1951, chipped away at the corner of the school to dislodge the time capsule so that it could be opened at the reunion and then preserve for the future. 

The time capsule was opened by Fr. Rich Adam and Patrick Costello at the June 24, 2017 Reunion.  It contained 3 newspapers:  The Catholic Messenger, the Davenport Democrat and the Daily Times. It also included a scroll inside a test tube that was sealed by a cork.  Inside the test tube was this letter written by
Fr. Flannagan:

This corner stone of the parish school of the Sacred Heart Cathedral parish, was laidSunday, July 5th, 1914, by Rt. Rev. Jas. Davis, D.D.,  Bhp of Davenport. 
Rt. Rev. Msgr. Flavin,V. G. of Des Moines, delivered the principal address. 
Rt. Rev. James Davis, Hon. M. F. Donegan &  (illegible) also delivered addresses.  Rev. Edw. F. Barron acted as Master of Ceremonies,
Rev. J.J. Troy, asst. Master of Ceremonies.

                                                                                                                            J. T. A. Flannagan, Rector
                                                                                                                                               July 5th, 1914