Spanish 
"The Church Emblem" - FYJ Episode 96
The emblem has slightly evolved over time. However it has appeared, the emblem has always represented the New Apostolic Church. The international church says: "The Church emblem is the visual identification mark of the New Apostolic Church and thus part of its identity. The symbolism of the cross, sun, and water is a reference to the Christian church. Any further significance is not intended."
The emblem or the cross can be put inside the sanctuary. Historically, it had always been a cross behind the altar, but, at one point, in the USA, we started putting the emblem in the sanctuary. Recently, especially with newer buildings, the USA has started to put the emblem only on the outside of the building (to designate that it is a New Apostolic Church) and the cross in the sanctuary behind the altar. This is because the cross is the symbol of Christ; He is who we want to focus on as we are in the divine service.
The cross is a unifying symbol for all Christians. If other Christians are visiting our churches, then they know that they are also with other believers.