This piece ran at the ICA gallery in Boston from January 22nd to April 27th of 2003. During that time, a camera and a microphone captured the myriad of images and sounds produced during the exhibition. Like the visible layers of a canyon, witnesses to sedimentary accumulation over time, the layers in Artifacts of the Presence Era tell us a story of past events. Here, the images and sounds produced in the ICA gallery are captured and then visualized as a growing, organic landscape that serves as a historical record. Like its natural counterpart, this process reveals long-term patterns (the rhythm of night and day, periods of great activity or empty silence), while retaining occasionally serendipitous, but often mundane, samples of the passage of life. The project visualized the accumulating layers of data and allowed visitors to navigate the captured images and ambient sounds, peeking back into the history of the gallery.