1240 apparently https://en.czech-unesco.org/13_8874_old-town-hall-brno/

It was built in 1858! Did not know that.

An old church going back to the early 1800s, though that's misleading.

The old part of the church is still there, but it's been updated and expanded over the years so that the foundation under one part is all that's original now.

We've got a pub from 1552 still standing and operating as a pub

We've got Roman ruins from 79AD too, but obviously they're not still a building really

The oldest building would be the cathedral built between 1628 and 1633 although the city walls were built between 1613-1618 and are still standing and complete

The town I live in burned down almost completely in 1787, so most historic buildings in the city were built after that. The city wall is probably the oldest structure, but it's unknown when it was originally built. The oldest building with a known year of construction is most likely the church that was built in 1246.

Gamle Aker Kirke, church from 1150 (Oslo).

My home town has a building built originally in 1220. It is still in use by a pub. That's over 800 years old!

Proper building was built at the end of 19th century. There is an old well that is a few hundred years old and the ruins of a Roman villa from about 2000 years ago.

Our old town hall was originally built in the 15th century but it is kind of a ship of Theseus situation as the oldest parts were destroyed in WWII.

A castle built in 1526. It’s still in use, but it’s a museum and restaurant now.

I'm not sure if it's THE oldest one, but Aarhus Cathedral is quite old, having elements from all the way back from the 1100s.

Still young compared to the city itself, though: Aarhus was originally founded in the 700s

Probably the 1840s in use. Ruins probably go back to the 13th century or thereabouts but they are no longer buildings..

I live in the western hemisphere, but a church…Late 1200s.

There was a shop, but that was allowed to fall in to disrepair, as the heritage order on it meant it couldn’t be changed, that was built around 1600s and knocked down a few years ago.

Next oldest now is a pub…late 1730s.

Build in 1723.

A house from 1867, although a suburb has a house from 1853. Both are still lived in.

I'm in a California suburb, and the oldest building we have is an old adobe barn from 1852, which is pretty old for California. We actually have a lot of historical buildings, too.

A church from 1845(ish),

Apparently there was one building from the 1830s but it was knocked down for a hospital, which ironically was also knocked down.

That will probably be the church that was built in 1190s

it's a bit hard to tell. of the buildings still standing and in use, the cathedral comes to mind, with was consecrated in 1238, but it stands on the site of the old mosque. this was torn down apparently in 1262, at which point construction on the cathedral began, but it would take centuries to finish everything.

there is another church that was named a parish in 1245 and so was probably already standing then, so perhaps that building is the oldest? I don't knoe how much of that original building is still standing though

The Old Tower from around 1300. It was part of a church that was destroyed in 1880.

Late 1800’s is when the town was established. Lots of houses from then are still standing, but a good number of them have had additions built, so they’re not 100% original.

Don't know about the oldest home, but I'm living in a house built 10 years before the US State I was born in became a US state.

Early 1800s is the best guess. It's a log house that is maintained as a sort of museum these days.

1626, three-storied house.

1887 Grissom House

• s&d spinning mill - 1847
• grass hill school - one room school house, 1861
• asa waters mansion - 1826-1832

1870 to 1871 Government house was built in Darwin Australia.

Luckily survived the Japanese bombing raids and still stands today.

1842, before the city was incorporated. A house. First big building I know of was built in 1888.

St. Augustine has buildings from around 1700, those would be the oldest in my state.

I remember going to London and being amazed by the old buildings, most of what is around here is from the 1920s or newer.