Probably in use since 1987
Blazon: Azure a lion rampant or, armed and langued gules; in the dexter chief a Maltese cross argent
I’m pretty confident in saying that the Maltese cross derives from the Knights Hospitaller, given their long association with the town. The Knights Hospitaller owned the town outright from 1281 through 1805, though they had a presence in the area dating back to 1258. I’m not sure about the lion, though.
Blazon: Azure a Corinthian capital argent
The capital (decorative top part of a column) was adopted in honor of the Roman city of Aguntum. Part of the ruins of the city lie within Dölsach, and the town hosts some of the archaeological finds in a museum. It was a thriving trade town until it fell victim to first the Huns, and then a succession of Western European tribes, including the Ostrogoths. What remained of the city was rediscovered in 1882.
Probably in use since at least 1987
Blazon: Per pale gules a fess argent and of the last a cross patriarchal throughout, arms in bend sinister of the first
These arms are not to be confused with the house of Hailfingen, who bore pily of three in fess argent and gules (sometimes gules and argent), though it’s certainly possible they were the source of the tinctures. I’m tempted to attribute the cross patriarchal to the heavily Catholic population of the region, but I doubt that’s actually true; the cross patriarchal was much more strongly affiliated with Orthodox Christianity.
Blazon: Per fess argent a cross of Calatrava gules and of the last, thirteen bezants in pale 4, 5, and 4.
Okay, first of all, about the eyes: they are not actual eyes. They are the sources of the Guadiana River, which are located near the town. Those get their name from a mistranslation from the Arabic: ﻋﻴﻦ can evidently mean both “eye” and “spring,” and whoever did the translation to Spanish picked the wrong one.
The cross of Calatrava is probably due to the fact that the town was granted to the Order of Calatrava in 1466. That was also the same year that the Grand Master of the Order, Pedro Giron, died suddenly in Villarrubia on his way to marry Princess Isabella – yes, that Princess Isabella, the one who ended up marrying Ferdinand II of Aragon and becoming Isabella I. Maybe it was a very odd way of expressing condolences? The bezants are attributed to the Counts of Salinas, who purchased the town in probably the early 16th century. I did find a record of at least one family with that surname using roundels in a similar arrangement, so it’s not completely out of the question.
Blazon: Vert on a chief argent a heraldic panther passant sable
These are fairly unsurprising arms, given the municipality’s name and location (on the border of Styria and Carinthia). The arms of Styria are vert a heraldic panther rampant argent armed and incensed gules, so Dürnstein in der Steiermark mostly just borrowed those, with some tweaks to tincture and positioning (and less fire).
Also, yes, heraldic panthers are weird. Very weird. Keep in mind that most of the people drawing coats of arms while these depictions were being established were a. in Europe, and b. had no concept of a panther beyond “ferocious beast sort of like a lion.” There is an unsupported theory that the fire-breathing which is traditionally an attribute of the heraldic panther was intended as a symbol of its wrath, but it’s the Middle Ages. They very well might have just figured panthers breathed fire.
In use since at least 2007
Blazon: Gules a beehive with bees volant or
I don’t have much information on these arms, but it does seem like there are some wild beehives in the town’s arboretum. (I’m not quite sure what a “wild bee place” or “Wildbienenlage” refers to, and I’d welcome any further input on that. My German isn’t very good.) They do seem very proud of the beehive’s traditional symbolism – diligence, cooperation, and hard work. While I know coats of arms aren’t typically granted or adopted due to the more esoteric symbolism, I can’t prove these weren’t, and I can’t bring myself to be the wet blanket.
Blazon: Azure two swords in saltire or, overall in the fess point an escutcheon gules a fess argent
I can’t really talk about anything to do with this town without mentioning the Battle on the Marchfeld, which was a turning point in the history of the Habsburg family, and therefore, of Europe as a whole. In 1278, Rudolph I of Habsburg defeated Ottokar II of Bohemia, establishing the former’s control over Austria and much of central Europe. They would remain one of the premier ruling families of Europe (sometimes the ruling family of Europe) for several centuries.
Weirdly, I can’t find much on the town’s arms. A scroll through the municipal timeline is worthwhile and interesting – note the Scottish lord who bought the town in 1696 – but not particularly informative from a heraldic perspective. It’s possible the swords are intended to be a reference to the Battle on the Marchfeld, but… I’m probably letting my imagination run away with me there.