Frank-Walter Steinmeier is Germany's Foreign Minister in Angela Merkel's coalition government.
A memorial has opened at one of the largest Nazi concentration camps within the former Soviet Union. German President Steinmeier has described the tribute to the forgotten victims as "invaluable."
Meeting with Polish President Duda, Steinmeier said European unity is only possible when members uphold common values. Relations between the two countries have been hampered by differing opinions over those values.
The German head of state is in India at a time of religious tension. He aims to promote mutual understanding, and is visiting sites that are holy to Hindus, Buddhists and Muslims. Katharina Kroll reports from New Delhi.
German President Frank-Walter Steinmeier has held talks with Indian officials, including Narendra Modi, on the third day of his India tour. Steinmeier will focus the rest of his visit on deepening Indo-German trade ties.