Police arrested a Portland art gallery owner for what they called graffiti posted all around town over the past few months.

The signs started showing up several months ago and officers said the Sherwood Field Water Tank in Washington Park was vandalized with similar graffiti and resulted in damages of $12,000.

Portland Police

Many of the face-adorned pieces were splattered with paint and said “Portland.”

Photos: The different graffiti signs

During the investigation, an officer spotted similar signs at a gallery on NW 19th. That led to Thursday’s arrest of 31-year-old Ryan Wendell Birkland for 31 counts of criminal mischief.

Investigators think Birkland was responsible for the graffiti.

Anyone with information in the case was asked to call police.