The verb “to be” can be expressed two different ways – Estar and Ser. And when it comes to location, the general rule is to use Estar. However, a common mistake individuals learning Spanish make is using Estar to describe the location of an event. This is a mistake. The location of an event is always described with Ser. For example:
La boda es en la iglesia. The wedding is in the church.
La reunion será en Chicago. The meeting will be in Chicago.
Remember, for the location of places, use Estar. ¿Dónde está tu casa? Where is your house? La universitad está norte de la ciudad. The university is north of the city.
But for events – use Ser!