A former Satrapy and home to the battle of the Sundered Rock and Kip Guile. It is also where the Color Prince first publicly revealed himself. After the False Prism's War and the burning of Garriston, each of the other six satrapies took turns governing Tyrea in two-year shifts (beginning with Paria), each pillaging and leaving the country destitute for the next in line to repeat the process. This continued until the events of The Black Prism when the Color Prince conquered it.
Tyrea is extremely fertile, "...figs, grapes, pears, dewberries, asparagus—everything grew here."