PHILADELPHIA — A man from Delaware has been charged with theft and concealment of an invaluable appendage from an ancient piece of art.

Michael Rohana, age 24, is accused of stealing the thumb of an ancient Chinese terracotta warrior statue at the Franklin Institute of Philadelphia.

Rohana was recorded on security cameras taking a selfie with the statue before breaking off its left thumb during an after-hours ugly Christmas sweater party at the museum on Dec. 21, 2017.

The 2,000-year-old statue is one of ten works on loan from the Shaanxi Cultural Heritage Promotion Center.

The Philadelphia museum noticed the thumb missing on Jan.8, launching an FBI investigation, led to the arrest of Rohana on Jan. 13 in his home in Delaware, where the thumb was being kept in a desk drawer.

He was released on bail and also faces charges of transporting stolen property across state lines.

The statue, on view in an exhibition of terracotta warriors at the museum on March, belongs to a clay army of around 8,000 soldiers, horses and other figures discovered in Xian in the tomb of China’s first emperor, Qin Shihuang.

It carries an estimated value of $4.5 million. The Shaanxi museum says it will reconsider its loan policy after the incident, and are now assessing the cost of repairing the damage.