Elisif’s Tribute is a miscellaneous quest given to the player by Jarl Elisif the Fair after The Man Who Cried Wolf. It gives access to Proudspire Manor.
Elisif will ask you to take Torygg’s War Horn to a shrine of Talos near Whiterun.
The shrine is east of Whiterun along the northern bank of the river underneath an overhang behind some trees. It is NNE of the Ritual Stone and Graywatch, and southeast of Shimmermist Cave.
When you turn the quest into Elisif, you will then be able to purchase property in Solitude.