At first, Google found an article at waymarking.com, where it was claimed that this shrine is also the city pillar shrine. The author of that placemark wrote
In other shrines I have seen there have been pillars or other secular material of some sort in the shrine, identifying the province. Not so here. Also, I have not been able to find a written source that identifies the shrine as the Lak Mueang of Chonburi. Piecing together verbal accounts from city officials, it seems that this building is both the City Pillar Shrine and a Buddhist shrine, a dual purpose.Since Richard wasn't able to find any pillar-like structure there nor any other hint of it being the city pillar shrine, I tried to find other source. Finally the Pattaya Mail issue from April 25 2008 gave a better hint - the article titled Women’s prison to make way for city shrine states that a city pillar shrine is planned to be built at the site currently occupied by the women's prison, which is to be relocated to a more spacious site. As this was from 2008, one should expect some development there by now. However, Richard tweeted
There is a prison opposite but the guard tower seems manned.So it seems Chonburi in fact has no city pillar shrine yet, unlike what I was expecting. When I was researching for the Wikipedia article on the city pillars, I found one source which states that in 1992 it was decreed that all province should have such a shrine. It is rather surprising that a quite wealthy province like Chonburi did not built one yet.