Because most immigrants were poor when they arrived, they often lived on the Lower East Side of Manhattan, where rents for the crowded apartment buildings, called tenements, were low. The Lower East Side Tenement Museum is in a building that used to be a tenement and it tells the story of immigrants in the City.
Change to a 115-grit diamond resin attachment and repeat the procedure as stated in Step 2. This attachment is less harsh than the 400-grit resin bond and will produce a smoother finish. Remember to constantly add water to the surface as you sand the travertine tile.
Being a natural stone, Travertine is extremely durable compared to most other flooring types (wood, vinyl, etc), and more than marble and slate. The durability of a porcelain tile is classified according to the PEI Rating, which is the durability index of porcelain and ceramic, and spans between 1-5 (higher PEI = more durable). E.g, Class 3 and above would suit both wall cladding and residential flooring. PEI-high porcelain would be more durable than Travertine.