Then, if you get closer, the trees in front would block even more than they do now.
Actually, I was thinking of going just adjacent to the trees. Either park the tripod right in the middle of the front gate for a face-on shot (presumably with both horizontal and vertical shifts for composition and perspective), or between or to the right of the trees (if that wall facing the courtyard needed to be in the shot).
Also, since the clock shows that it's about 10:50, that means that the church is on the east side of the street and the camera is basically pointing northeast. And it's in Italy, the heart of the Mediterranean. In other words, this church is practically on its knees begging for its portrait to be taken in the last rays of the setting Sun, and not in harsh midday light.
Yes...that would be my plan. Golden hour, TS-E 17, portrait orientation, just inside the fence between those two trees, focal plane square to the front entrance and whatever movements were necessary for composition. And I'd do whatever I could to throw a lot of light from the inside on the window...have them turn on the interior lights, radio flash triggers with superlative range, whatever.