SIGNA is a Copenhagen-based artistic collective founded by Signa and Arthur Köstler. Since 2001, the collective has developed immersive performance installations, evolving from the works of Signa Sørensen (now Köstler).

SIGNA creates site-specific performances in non-traditional art spaces, working with international ensembles to develop fully immersive endurance installations. Combining performance, installation, improvisation, and highly curated visual environments, their works explore structures of power and degradation, identity, desire, fate, and social relations.