Meanings of doubly sacred in English

If she had been sacred before, Katherine was rendered doubly sacred to him now.

And doubly sacred when, as tonight, it followed upon an hour spent with her?

The persons of Saturninus and Glaucia were doubly sacred, for one was tribune and the other praetor.

But I had promised my uncle, and now that he is dead, the promise is doubly sacred.

I thought of her as a mere child, and a child who was doubly sacred because of her affliction.

It seems to me it is a doubly sacred duty now to be brave, for I must do honor to my teacher's name.

The great body of the commonwealth is committed in revengeful zeal to prosecution; upon whom devolves the doubly sacred and imperative duty of defence?