Mormon History, Aug 14, 1845

[Nauvoo Temple] The last shingle was laid on the temple's roof. The Nauvoo Neighbor issued on this date; its publication was delayed a few hours so that it could report that the last shingles had been placed on the temple roof and that the window frames and sashes were ready to be placed.

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