Millennials inherited a dusty old apartment in Italy. They renovated it — only to be told they should have left it alone.

• A millennial couple spent 17,000 euros, or about $18,400, remodeling an old apartment in Rome.
• When they shared the renovation on social media, they were shocked to hear from many critics. 
• Some people said they "destroyed" the home's vintage vibe, but the couple defended their choices.

Flavio Fabiani knew he had his work cut out for him when he stepped into the apartment in Rome's colorful, bar-lined neighborhood of Pigneto.