We know St Peter's (and other churches) in Rome was of this type, but here are two others outside Rome.
In Verona, the Cathedral is oriented NE/SW. The old high altar faces SW, towards the nave and congregation, and is clearly originally intended to do just that, even though a screen (you can see the pillars) intervenes. The bishop's throne is at the centre of the apse behind.
Verona Cathedral, looking SW, down the church towards the nave.
At some later stage, wooden steps have been added on the congregational side, so that Mass may be celebrated NE, into the apse. You may note, by way of interest, the 'confession' hole at the front of the altar in imitation of the high altar at St Peter's in Rome.
Verona Cathedral, looking into the apse from the rood screen.
Here is another example in the (former) Cathedral at Chioggia, just outside Venice. In this case there has been no attempt to add steps in front, but this altar is clearly old and intended to be used just as it is used today, though in this case the celebrant does indeed face East.
Chioggia Cathedral. looking west into the apse.