Jeepers...
Kendel, I've read and re-read this thread and besides a bit of bickering as to methods there were no insults intended. Text is tricky to deal with and there were un-clear details that muddled the issue further. Everybody was just trying to help in their own way.
One final tip: To determine if the grout (what you might be calling ciment) has adhered to a tile (e.g.. has the tile been loosened previously) use a screwdriver and tap lightly on the tile with the handle. A tile with inadequate grout will have a hollow sound and a solidly attached tile will not. This will help to determine if tiles have been messed with before.
Good luck and hope you find that treasure!
peace all,
cc
edited to add:
Lastleg...Kendel's own clarification contributed to the confusion...Have a review:
...clip...Am making myself understood here ; the room has a concrete floor which it didn't have in 1800s...clip...the whole room which is quite big...clip...not alerting the curious...clip..."CORRECTION : the floor was only cimented and tiled in the 50s ; no concrete, no reinforcement was carried out and i assume that since the place was an old construction, rocks & stones may have been used mostly...clip...Re-details of soil, I hve provided what i hve gathered from an elderly dad whose memoire is fading. It was a dirt soil, then cimented and ceramic tiled, i have no idea if it the job was done by amateur or professionel. "
Note the use of the word ciment, if he means cement then well, guess what? Cement is an ingredient of concrete...Note also the use of the word ASSUME and MAY HAVE BEEN. It is obvious that he doesn't know much about the construction of what he is attempting to tear up.
Your post is a perfect example of what can happen when a person doesn't read carefully, just as you accused others of doing. Oh well, shrug...I just saw people trying to help, guess some perspectives vary considerably.