90 Urban Regeneration; Creating a Vibrant Urban Space by Emphasizing on the Cultural-Artistic Activities Redevelopment: Evidence from Southern Lalezar Street in Tehran Rahim Hashempour 1 1 Ph.D., Faculty Member of IKIU. Iran\ Karaj\ Azimiyeh. Email: hashempour@arc.ikiu.ac.ir Fardin Heidari 2 . Fardis \ Karaj \ Iran . IKIU : A. Student of Urban Design M. 2 E-mail: fardinheidari91@yahoo.com Mani Sattarzad Fathi 3* . Mehrshahr \ Karaj \ Iran . IKIU : A. Student of Urban Design M. * 3 E-mail: manisattarzad@yahoo.com Abstract Nowadays, in historical cities, many of the urban spaces due to the changes arising from modern urban development and the lack of attention to different spatial qualities have lost their identities and also the importance of their past resulting from the city’s history and its culture. In this study, the purpose is to restore the urban life and the identity, associated with the historical past of the Southern Lalezar street in Tehran; in this regard, by adopting the urban regeneration and vitality approaches, is tried to create a suitable human-oriented context in relation to missing background. According to the theoretical reviews and the empirical investigations, this paper tries to restore the value and meaning of the Southern Lalezar street and its public spaces, with emphasis on some appropriate principles, like pedestrian-orientation, internal and infill development, using brownfields and the injection of the artistic and cultural activities. Finally, by extracting some principles and different methods from the urban regeneration and vitality approaches and also analyzing the case study, have been attempted to revive the old but valuable urban structure and emphasize the redevelopment of historical identities of the Southern Lalezar street. Keywords: Urban regeneration, Vitality, Identity, Cultural-artistic activities, Southern Lalezar Street.