Whether narrated or experienced, the architectural heritage of the Principality of Monaco is both a paradox and an irreversible testimony to the passing of time. With a combination of belle époque, post-war and more contemporary styles, Monaco is a laboratory of ideas that stands out with its many architectural facets. From the nineteenth and twentieth centuries race towards decoration to that towards square metres and the heights in recent years, I tell you a story walking through the narrow and winding streets of my home country. Between destruction, preservation, elevation and construction, this dissertation paves the way for a better understanding of the past and present challenges of Monaco, where urban, economic and demographic constraints are constantly manifest themselves.