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
It means, "...to live on the fifth floor."
My aparment is in the second block
"I am on the first floor."
En El Jardín was created in 1996.
"Celia en el colegio" was created in 1996.
Con el diablo en el cuerpo was created in 1947.
Con el dedo en el gatillo was created in 1940.
Luz en el páramo was created in 1953.
Juguemos en el mundo was created in 1971.
Frutas en el Café was created in 2005.