Every architectural intervention joins a constellation of pre-existing conditions, which often constitute a fragile but valuable situation: the physical support of collective memory. The objective of this article is to explore contemporary ways of intervening in architectural heritage from the perspective of collective memory, through what is imagined to be a timeless grammar, towards design innovation. Works produced according to this strategy not only try to maintain the character of an architectural legacy but also to generate new models based on received precedents. The following article explores intervention projects from the last two decades of work by Swiss architect Peter Märkli, identifying key themes and strategies employed. The synthesis of these works allows us to identify a way of approaching heritage based on the continuity of architecture as a key to innovation.