A MP from the Left Party was kicked out of parliament on Tuesday, after wearing a T-shirt with written on it. Cansin Köktürk was initially asked in private by the president Julia Klöckner to remove the offending item of clothing.
However, she refused to do so, forcing Klöckner to intervene and throw her out. "We have agreed and these are the clear rules of the House, that neither stickers nor any other form of denomination on T-shirts play a role," she told MPs.
"I have asked Ms. Köktürk to change her sweater - and we did not make that public - but you apparently refuse.
"I would then ask you to leave the meeting. Please do so."
Köktürk has courted controversy on previous occasions, most notably when she turned up on her very first day in parliament wearing a a scarf resembling a Palestinian keffiyeh.
Köktürk later responded to her eviction from parliament in a defiant post to her X social media page.
"Germany will continue to supply weapons to Israel," she wrote. "Not a word about over 50,000 dead and injured children.
"I am being asked by Mrs. Klöckner to leave the plenary hall because my shirt says 'Palestine.' You have all failed so badly."
There is no detailed dress code for MPs attending parliamentary sessions.
However, rules require MPs and visitors to dress "in keeping with the prestige" of the institution.
The enforcement of the rules is left to the discretion of the session chair.
Köktürk is not the only person to have caused a stir through the choice of her clothes.
MP Marcel Bauer was twice expelled from the plenary chamber for refusing to remove a black beret, which was deemed inappropriate.