Short answers, pulled from the story.
The Great Council met for the last time on the 12th of May 1797 and declared the Republic abolished with 512 votes in favor. This session marked the formal dissolution of the state after centuries of traditional policy.
Doge Ludovico Manin opened the final session of the Great Council on the 12th of May 1797 to declare the end of an era. He subsequently deposed his insignia and announced the decision to crowds gathered below the balcony of the Doge's Palace.
Of the 184 ships in the Arsenal, those already equipped were sent to Toulon while others were scuttled ending the Venetian navy forever. The Doge's galley Bucintoro was denuded of all sculptures which were then burned on San Giorgio Maggiore island to recover gold leaf.
The Treaty of Campoformio signed the 17th of October 1797 formally consigning Venetian territories to Austria according to secret clauses of Leoben. This agreement ended the Provisional Municipality and all other Jacobin administrations established by French forces immediately.
Austrian troops entered the city on the 18th of January 1798 ending the period of plunder that began with the French military committee taking power on the 28th of December. Venice returned to Austrian rule entirely following the fall of Napoleon War Sixth Coalition on the 20th of April 1814.