First of all, we ordain that in the Cathedral Church in the city of Granada a worthy Chapel shall be built, where, when it pleases Our Lord to call us,
our bodies shall be placed.
This chapel shall be called the Royal Chapel and shall be dedicated to St. John the Baptist and
St. John the Evangelist.

( Royal Warrant of the Catholic Kings )
 
  

And, therefore, it is my will that our bones rest there for ever and ever, where the mentioned serene lady's bones shall be placed too,
so that they praise
and bless jointly her holy name.

( Ferdinand’s Testament )