Architecture is identified by its presence, its perceived reality. Architecture study is research in essential, defining values of architecture. Within multitude of discipline's constitutive elements, the objectification of architecture's perceived state is still one of its vital and specific tasks. No matter technology, economy or social normative imperatives, architecture is aestheticized, reflective research. A meaningful creative act no matter of aesthetic code or material circumstances. Architecture's immaterial, yet identifying difference is processed by exact conceptual decisions. Study of architecture must sustain a course where a working process is identified as a concept of work itself, where ephemeral emerges out of exact, conceptual execution. Ephemeral is a perceived state, it requires a sensitive person. In time of study, the search of ephemerality through tectonics of architecture lesson is sensitizing pedagogical tool. It is a foundation for architecture's cultural and human role. In times of intertwining disciplines, architecture must keep tools for protecting its disciplinary identity and intangible, defining differences. A course unit where precise and consistent production leads to authentic if ephemeral presence is valuable tool for affirmation of Architecture's immaterial, unmeasurable identity.