al departamento de

to the department of

→ al
phrase Rare #45,209
to the department of Depending on context, “departamento” can mean a department or an apartment; the examples include both uses.
SP: Voy al departamento de ventas.
EN: I'm going to the sales department.

Terminamos con usted ahora y vamos al departamento de policía.

We're done with you now and we're going to the police station.

— Sin Amor (2017)

Tom acaba de llegar al departamento de Mary.

Tom has just arrived at Mary's apartment.

Fui al departamento de Tom.

I went to Tom's apartment.

Por favor, llama al departamento de bomberos.

Please call the fire department.

¡Llama al departamento de bomberos!

Call the fire department!

Mis disculpas al departamento de Recursos Humanos.

My apologies to the Human Resources department.