In the world of Greyhawk, Merikka is the demigoddess of agriculture, farming and the home. This temple is found in Orlane, but she has other worshippers throughout the Flanaess, especially in small, rural villages.
You can find high resolution, DM and player maps on this post on the adventure in which this building was created, Against the Cult of the Reptile God. https://www.patreon.com/posts/orlane-cult-of-130295537