The church with the unusual, metallic spire is Evangelical Lutheran.
The story I read on the internet–so it has to be true–is that the congregation couldn’t afford to complete the steeple in the usual style. However, they received a donation of scrap iron, from which they constructed an interesting–if unconventional–spire.
This Triumphal Arch, called the Diadalív or the Stone Gate, dates to 1764.
I took this photo near the Danube in Vác. I’m not sure what the thing that looks like bowling pin is supposed to be (hence the Nude Bowling Trophy Topper comment.) Maybe it’s supposed to be a vase. At any rate, it’s a nifty work of art.