Conversation so far:
How did Boris die?
23 April 2007.
what caused his death?
congestive heart failure.
where was his funeral?
had lain in repose in the Cathedral of Christ the Saviour in Moscow.
how many people attended?
CANNOTANSWER.
what else happened during his funeral?
his body had lain in repose.
what else is noteable about his death?
President Putin declared the day of his funeral a national day of mourning, with the nation's flags flown at half mast and all entertainment programs suspended for the day.
what else did Putin do?
[Yeltsin's] presidency has inscribed him forever in Russian and in world history.

Question: what did yeltsin do to earn that?
Self-contained rewrite: what did yeltsin do to earn Putin inscribing him forever in Russian and world history?