The Footprints of the Builders of the Lod Mosaic were Exposed(Temporary IAA press release, via Joseph I. Lauer's list.)
While removing the mosaic from the ground, Israel Antiquities Authority conservators were surprised to discover 1,700 year old foot and sandal prints beneath it
Head of the Israel Antiquities Authority Art Conservation Branch, “It’s exciting. This is the first time I have ever encountered personal evidence such as this under a mosaic”.
Background on the Lod Mosaic is here.
UPDATE (29 March 2010); The permanent location of the press release is here.