From Salvator Rosa metro stop on Line 1.

In the station, take escalators up and follow exit signs to Santacroce.

When you emerge, go down hill keeping on the left hand.

Piazzetta Trinità alla Cesarea is on the left: it is not the first alley you find (Vico San Mandato), it is the second alley, basically, a little stairway with a crumbling church on top.

Walk toward it - we are tucked just around the corner to the left.