Vestige. As defined by Merriam-Webster (1): a trace, stuff mark, click or visible sign left by something (as an ancient city or a condition or practice) vanished or lost (2): the smallest quantity or trace.
Origins: Middle English, for sale from Middle French, from Latin vestigium footstep, footprint, track, vestige. First Known Use: 15th century.
Several new works are completed and others in development, spring 2016.