Feldioara is a commune in Brașov County, Transylvania, Romania, about 15 km (9.3 mi) north of the city of Brașov. It is composed of three villages: Colonia Reconstrucția (Bohntelep), Feldioara (German: Marienburg, [maˈʁiːənbʊʁk] ^ⓘ; Hungarian: Földvár or Barcaföldvár), and Rotbav (Rothbach; Szászveresmart).

The commune is located in the east-central part of the county, in the northern reaches of the Burzenland. It is situated on the left bank of the Olt River, which mostly follows the border with Covasna County. The rivers Bârsa and Homorod discharge into the Olt near Feldioara.

The commune is crossed by national road DN13 [ro], which links Brașov with Sighișoara and Târgu Mureș. Road DN13E [ro] branches off in Feldioara, passes through Sfântu Gheorghe (26 km (16 mi) to the east) and Covasna, and ends in Întorsura Buzăului. The train stations in Feldioara and Rotbav serve the CFR Main Line 300, which connects Bucharest with the Hungarian border near Oradea.

Feldioara has a medieval fortress long believed to have been built by the Teutonic Knights. However, more recent studies show that the Fortress in Feldioara was actually constructed by the local community.^{[citation needed]} The name of the village comes from the Hungarian word földvár, which means "the clay fortress". The ruins of the fortress can still be seen today. The German name Marienburg means "fortress of the Virgin Mary".

Rotbav is the Romanian name of the formerly Saxon village of Roiderbrich (Transylvanian-Saxon name), called Rothbach in German and (Szász-)Veresmart and (Szász-)Vörösmárt in Hungarian, Szász meaning Saxon.

Colonia Reconstrucția is the Romanian Communist-era name of a workers' settlement established in the 1930s around a new brick factory and initially called after it, Colonia Bohn in Romanian and Bohntelep in Hungarian. The company running the factory was nationalised by the new Communist regime in 1948 and the factory was renamed Reconstruția ('Reconstruction'), with the settlement being administratively detached in the 1950s from the village of Feldioara under the name of Colonia Reconstruția.

At "La Pârâuț" in Rotbav, archaeologists discovered an important Bronze Age site with six distinct occupation layers.

Between 1211 and 1225, Marienburg [de] ('Castle of Mary') was the Teutonic Order's quarter in Burzenland; their Ordensburg would later become a Saxon peasants' stronghold. A 1439 document states that the civilians of Feldioara built this fortress "with great financial and physical expenses" in order to protect their families and possessions.^{[citation needed]} The fortress withstood the Turkish invasion of 1421, but it was severely damaged by a second invasion in 1432. It took until 1457 to restore it.^{[citation needed]}