* The October referendum is weighing on market sentiment
* The polls suggest a very close race…
* …and Mr Renzi's leadership of the country could be at risk
We answer ten questions on timeline, prospects, and implications of the referendum:
1. What is the referendum about?
2. When will it take place?
3. How does the referendum work and are there any precedents?
4. What in the event of a YES vote?
5. What happens in the event of a NO vote?
6. Could Mr Renzi cancel the referendum and/or renege on his resignation?
7. What are the opinion polls saying?
8. What could affect the result in the coming weeks?
9. What does it mean for the markets?
10. Would a NO win increase the chances of Italy leaving the euro?