David Rawcliffe, the house and monument steward at the National Trust's Chedworth Roman Villa, cleans a Roman mosiac in the new environmentally-controlled conservation shelter on March 19, 2012 near Cirencester, England. More of the 1600-year-old Roman floors will be uncovered over the coming year.

David Rawcliffe, the house and monument steward at the National Trust's Chedworth Roman Villa, inspects part of a Roman mosiac in the bath house preserved in the new environmentally-controlled conservation shelter on March 19, 2012 near Cirencester, England. Opened this month, the multi-million pound building allows visitors to walk on suspended walkways just above the 1600-year-old Roman floors and to see recently excavated mosaics not seen for 150 years, with more to be uncovered over the coming year.

Council staff clean a section of the rarely seen Minton tiled floor at St. George's Hall on Jan. 4, 2012 in Liverpool, England. The exquisite floor which is usually covered for protection is in the process of being competeley unveiled to allow the public a glimpse of the 30,000 handmade mosaic tiles from Saturday, Jan. 7 to Sunday, Jan. 22. The Minton covering was layed in 1852, and depicts dolphins, tritons and sea nymphs reflecting Liverpool's seafaring heritage.

A cleaner prepares the rarely seen Minton tiled floor of the of the grand St George's Hall on Jan. 27, 2009, Liverpool, England.

The Minton tiled floor in St. George's Hall on Jan. 27, 2009, in Liverpool, England.