In this chapter I discuss theoretical notions such as the meanings of a monument, the historization of time, temporal collage and the landscape’s multi-temporality in relation to studying the biographies of prehistoric monuments in the landscape. In the second part I draw on texts by Jorge Luis Borges to discuss some of the inherent difficulties of this approach. Implied assumptions of a single and unchanging identity over time of prehistoric monuments in the landscape are problematic. I conclude by suggesting that the life-history approach to monuments and the concept of landscape biographies need to be developed further, and ultimately overcome, as new approaches of landscape research emerge.