MacDonald Stradivarius Viola

When it comes to size and sound quality, violas are distinct from violins. Leaving that aside, they are nearly identical. The MacDonald Stradivarius Viola holds the record for being the most costly musical instrument ever made.

The viola was named after one of its 19th-century owners and is one of just ten Stradivarius violas that is still in good condition today. Antania Stradivari, one of history's most known craftsman, produced the MacDonald Stradivarius Viola in 1719. Furthermore, this is considered Antania Stradivari's golden period, as some of his most famous works were made during this time.

Despite holding auctions to sell this exquisite instrument, it was not successful. The Macdonald would be the most expensive instrument ever sold if it were to be marketed.

Price: $45 million