Mormon History, Oct 5, 1845

[Nauvoo Temple] Sunday services convened in the enclosed temple, with all its windows in, temporary floors laid, benches and pulpits in place. Approximately 5,000 were in attendance. During the services Brigham, in offering the opening prayer, presented "the temple, thus far completed [to the Lord], as a monument of the Saints's liberality, fidelity and faith." He concluded, "Lord, we dedicate this house to thee and ourselves to thee." One participant left the following description of the finished temple's dimensions: The height of the temple from the ground to the top of the eaves 60 feet, from the eaves to the top of the attic story 16 1/2, tower 12 1/2, belfry 20 feet, clock section 10, observatory 16, dome 13 1/2, ball and rod 10, total 158 1/2 feet.

[source: Brown, Lisle (compiler), Chronology of the Construction, Destruction and Reconstruction of the Nauvoo Temple]