As Philadelphia heads into a wide open year with a new administration at the helm of the city, Hidden City takes one last look at 2015. Our fifth annual Lost Buildings list is presented here by Daily co-editor Brad Maule

The sub basement foundation of East Market was poured this week marking the project’s first phase of construction. Hidden City co-editor Michael Bixler went behind the gates of the massive redevelopment site to see the 35 concrete truck operation in person and brought back these photos.

Demolition of 1100 Market Street is entering its last phase as the block makes way for East Market, a 17 story residential tower and urban retail village that aims to transform the area into a showplace for the city. Hidden City co-editor Michael Bixler went down to the site to grab these parting shots of the building and its storefronts as they quickly evaporate into memory