At just after 4.30pm on Sunday Alicia Laird closed the doors on an era of the Whanganui Regional Museum.
It won't open to public again until 2018.
The nine-year-old Kaitoke School girl was given the job off locking the door before the building undergoes earthquake strengthening work.
She was chosen by museum staff to perform the task at the closing ceremony as she was one of the museum's most frequent visitors.
Alicia had several favourite exhibitions, including the moa and the old classroom.