Read and complete the sentence with the correct part.

What once was the Principal Medicine Store now houses a huge collection ...

• covering Russian history since the time of the Stone Age.
• was opened to the public in 1883.
• in the style of Russian churches.
• Red Square in the heart of Moscow.
• and the consolidation of the Russian state.
• most prominent buildings in Red Square.
• that once inhabited the big territory of present-day Russia.
• dynasty during their reign.
• examining the growing network of roads and how people travelled in the past.
• which is an attraction in its own right.