The aim of this paper is to explore the museum as possible lieu de memoire (or site/realm of memory) as articulated in the writings of French historian, Pierre Nora (1989, 1996). My effort lies in how to debate, from a theoretical perspective, issues on history, past, memory and their ongoing construction in cultural institutions. In order to do this I will briefly account for the creation and transformation of the modern museum, then I will concisely discuss the exhibition New York Divided: Slavery and the Civil War as an attempt to illustrate with concrete examples the main exploration of this paper. The exhibitions and displays alluded to in this work are mainly of historical character since the museum as part of a historical process and its connections to past, memory, and present are the central issues addressed here.