»Dimensions. Journal of Architectural Knowledge« is an academic journal in, on, and from the discipline of architecture, addressing the creation, constitution, and transmission of architectural knowledge. It explores methods genuine to the discipline and architectural modes of interdisciplinary methodological adaptions. Processes, procedures, and results of knowledge creation and practice are esteemed coequally, with particular attention to the architectural design and epistemologies of aesthetic practice and research. Issue 3, »Species of Theses an Other Pieces«, is concerned with the form of the doctoral thesis in practice-oriented research. In reference to George Perec's »Species of Spaces and Other Pieces«, this issue takes the love for playing with forms, genres, and arrangements as its program. Meike Schalk (Prof. Dr.) lehrt Urban Design und Urbane Theorie am KTH Royal Institute of Technology, Stockholm. Torsten Lange lehrt Architektur an der Hochschule Luzern. Andreas Putz (Prof. Dr.) lehrt Recent Building Heritage Copnversation an der TU München. Tijana Stevanovic is a lecturer at The Bartlett School of Architecture, University College London and a post doctoral fellow at KTH School of Architecture in Stockholm. She completed her doctoral thesis »Incorporating Self-management: Architectural Production in New Belgrade« at Newcastle University in 2019. Her research is situated at the intersection of architectural history, critical theory, and cultural studies, focusing on questions of labor, technology, subjectivity, and knowledge production.