Lincolnshire Police are investigating the theft of two cast iron urns — worth more than £2,000 — from the Arboretum park in Lincoln.
Officers believe the incident took place some time between 5pm on October 27 and 8.20am on Friday morning.
Two urns, which contained plants, were stolen from the park. There is no description of the offenders.
Police are appealing for information on this theft, and are asking anyone with information to call them on 0300 111 0300.