Lastau was first mentioned as Lostatawa in Thietmar of Merseburg's chronicle of 981.
In 1220 it passed into the hands of Margrave Dietrich the Oppressed and in 1221, after the family of the former owners gave up all rights to the village, to Buch Abbey near Leisnig.
A contract dated 1265 gave permission to erect a water mill and stipulated that no further mill should be built between Lastau and Colditz.
Margrave Frederick the Serious placed part of the possessions of the monastery under his protection, including Lastau which was then known as Lostowe.
In 1378 the parishes of Lastau and Zettlitz were joined because of a lack of funds for the church of the latter.
From then on until the Protestant Reformation Lastau was a filial church of Zettlitz.
The village remained under the jurisdiction of the monastery in Buch.

In 1548 Lastau numbered 23 besessene Mann (land-owning farmers), owing allegiance to Kloster Buch which had by then been transferred into the hands of prince-elector Johann the Steadfast.
The mill burned down in 1710, but was rebuilt.

An observation tower was erected on nearby Burgberg in 1888 on occasion of the 800-year jubilee of the House of Wettin.
The tower was destroyed towards the end of World War II.
Lastau was first mentioned as Lostatawa in Thietmar of Merseburg's chronicle of 981. In 1220 it passed into the hands of Margrave Dietrich the Oppressed and in 1221, after the family of the former owners gave up all rights to the village, to Buch Abbey near Leisnig. A contract dated 1265 gave permission to erect a water mill and stipulated that no further mill should be built between Lastau and Colditz. Margrave Frederick the Serious placed part of the possessions of the monastery under his protection, including Lastau which was then known as Lostowe. In 1378 the parishes of Lastau and Zettlitz were joined because of a lack of funds for the church of the latter. From then on until the Protestant Reformation Lastau was a filial church of Zettlitz. The village remained under the jurisdiction of the monastery in Buch.
In 1548 Lastau numbered 23 besessene Mann (land-owning farmers), owing allegiance to Kloster Buch which had by then been transferred into the hands of prince-elector Johann the Steadfast. The mill burned down in 1710, but was rebuilt.
An observation tower was erected on nearby Burgberg in 1888 on occasion of the 800-year jubilee of the House of Wettin. The tower was destroyed towards the end of World War II.
Lastau