More than 220 people were killed in the blast, and several thousand were injured.
Some 21 million people in Germany, around a quarter of the population, either migrated to the country or are the children of migrants, Mr Steinmeier said.
Under Germany’s basic law, the president can dissolve the parliament at the chancellor’s request following a failed vote of confidence.
German Nazis murdered almost 800 people in Marzabotto.
Messrs Steinmeier and Erdoğan were scheduled to meet for around three hours, with some unpleasant topics likely to be discussed.
German President Frank-Walter Steinmeier on Tuesday arrived in Kiev in a surprise visit.
The focus of Mr Steinmeier’s visit which will lasts until Wednesday, will be the establishment of facilities to produce COVID-19 vaccines in Africa.
