Probably:
mesquita / mosque / masjid

Hazrat Khadijah Jame Masjid
Rua Palmira 64B

Sources:
https://hsalah.info
https://irp.cdn-website.com/cce0f1db/files/uploaded/anjos_jul.pdf

Somewhere in this street:

Mesquita/mosque/masjid

LUGAR de CULTO do ROSSIO
Calçada de Garcia nº5-3

Somewhere on this street:

Martim Moniz Jam-e Mosjid
Rua do Terrereinho no 86

(Mosque / mesquita)

Somewhere on this street:

MESQUITA MARTIM MONIZ Baitul Mukarram
Calçada Agostinho Carvalho nº 13 C
1100 Lisboa

The area tagged as “brownfield” here appears to be a mistake: at least the equestrian centre south of this point is fully operational, and the barracks north also appears to be in use.

Gatwick is missing its two prayer rooms. Not surveyed, description on LGW chaplaincy page:

Where to find the the chapel and prayer rooms
South Terminal, before security:

On the third floor near, if you come up the escalators or lifts and turn right, it can be found at the far end of the corridor.

North Terminal, before security:

On the first floor, if you come down the escalators or lifts and turn right, it can be found at the far end of the self-service check-in area, just before the entrance to the Hampton by Hilton Hotel.