article_snippet: There will be many fascinating questions to be addressed as we undertake this complex restoration project. '
article_snippet: Thousands of damaged pieces of building material have been marked in the hope that experts can put experts back where experts were before .
article_snippet: Blackened stones from the library's walls have been numbered with chalk.
article_snippet: Thousands of damaged pieces of building material, including blackened stones from the library walls, have been removed and numbered with chalk in the hope that experts can put experts back exactly where experts were before.