As the excellent Rectaratio blogspot points out

"Quomodo sedet sola civitas
Plena populo!
Facta est quasi
Vidua domina gentium:
Princeps provinciarum
Facta est sub tributo!"

The Book of Lamentations helps us understand the tragedy of modern times and the desolation of the Church of God.

How doth the city sit solitary
that was full of people!
how is the mistress of the Gentiles
become as a widow
the princes of provinces
made tributary!

or also appropriately Lam 1:10
The enemy hath put out his hand
to all her desirable things:
for she hath seen the Gentiles
enter into her sanctuary
of whom thou gavest commandment
that they should not enter into thy Church.