Germany's tough stance on fraying relations with Turkey is "understandable," not least given Ankara's detention of human rights activists including German nationals, EU Commissioner for Enlargement Johannes Hahn said in an interview published on Saturday.
In an escalating war of words between Ankara and Berlin, Finance Minister Wolfgang Schäuble compared Erdogan's Turkey with the former communist German Democratic Republic (GDR).
German business groups warned Thursday that economic ties with Turkey would go from bad to worse as a sharply escalating diplomatic row heightens uncertainty.
Turkey on Thursday accused Germany of displaying "great political irresponsibility" in stepping up a travel warning for the country after Berlin reacted angrily to Ankara's latest arrests of human rights activists.
Since last July, some 22 German nationals have been arrested in Turkey. Nine still sit in prison. But Berlin is struggling to come up with an effective strategy against an ever more hostile Ankara.
Chancellor Angela Merkel's spokesman on Tuesday condemned the detention of a human rights activist, who has become yet another German swept up in Turkey's mass arrests amid President Recep Tayyip Erdogan's ongoing crackdown on perceived opponents.
Germany on Friday said Turkey once again blocked a visit by its lawmakers to German troops stationed at a Turkish base, a move adding to tension in their relations.
Turkey's President Recep Tayyip Erdogan lashed out at Germany on Wednesday, warning that it was "committing political suicide" on the eve of his expected meeting with Chancellor Angela Merkel.
The feminist founder of a new, "liberal" mosque in Berlin is now under police protection "around the clock" after receiving numerous threats, which she blames on Turkey.
Turkey protested officially to Germany on Tuesday that an artist had been allowed to set up an installation in central Berlin, apparently offering a car as a prize in exchange for killing world leaders including President Recep Tayyip Erdogan.
Germany said Thursday it had rejected a request by Turkish President Recep Tayyip Erdogan to address ethnic Turks in Germany next week on the sidelines of a G20 summit.
After several of Turkish President Recep Tayyip Erdogan's bodyguards assaulted demonstrators in Washington, Berlin has told the Turkish leader his paid thugs aren't welcome in Hamburg in July.
Berlin on Friday warned Ankara against interfering in how people in Germany practised their religion, as a new row erupted over a new "liberal" mosque in the German capital.
Turkey's religious affairs agency has expressed distaste over a new mosque in Berlin where men and women mingle freely, saying it was incompatible with the principles of Islam.
Germany's ambassador to Turkey on Tuesday met in jail with Die Welt daily newspaper correspondent Deniz Yucel for the first time since he was imprisoned on terror charges earlier this year.
Angela Merkel's cabinet agreed on Wednesday to withdraw its troops from Turkey's Incirlik base, after last-ditch talks with Ankara failed to resolve an escalating row.
Germany has no choice but to pull its troops out of the key Turkish airbase of Incirlik, after failing to reach agreement with Ankara on visits by politicians, Foreign Minister Sigmar Gabriel said on Monday.
Turkey will maintain a ban on visits by German politicians to a key airbase in its south which is used for raids against the Islamic State group in Syria, the foreign minister said on Monday.
Foreign Minister Sigmar Gabriel will fly to Turkey for talks next week over the thorny issue of access to the Incirlik military air base near Syria, his Turkish counterpart Mevlut Cavusoglu said on Tuesday.
The European Court of Human Rights is set to take on the case of a German journalist detained by Turkey for months, the reporter's newspaper wrote on Thursday.
A German parliamentary delegation has called off a Turkey trip, saying Wednesday that Ankara had made clear they were not welcome amid a festering bilateral row.
Turkey's prime minister said on Tuesday that Germany must decide between its friendship with Ankara and alleged coup plotters, after Berlin granted political asylum to military officials with suspected links to last year's failed putsch.