En el último piso was created in 1942.
En el primer piso
It means 'floor', in the sense of a level in the building, e.g. vive en el primer piso = he lives on the first floor. It can also mean flat, apartment, thus: Mi piso es en el primer piso = my flat is on the first floor. 'Floor' in the sense of 'ground' is 'el suelo', e.g. En el suelo de mi piso hay una alfombra = On the floor of my flat there's a carpet
My aparment is in the second block
It means, "...to live on the fifth floor."
i'm on the first floor.
Celia en el colegio was created in 1932.
En El Jardín was created in 1996.
Con el dedo en el gatillo was created in 1940.
Con el diablo en el cuerpo was created in 1947.
El Rey en Londres was created in 1966.
Disloque en el presidio was created in 1965.
Florencia en el Amazonas was created in 1996.