Jeb Bush made an unannounced visit to Auschwitz yesterday during a European tour.

The former Florida governor, who is visiting Germany, Poland and Estonia ahead of his expected formal announcement next week of his run for the Republican presidential nomination, visited the former Nazi concentration camp on Wednesday, Bloomberg News reported.

Bush, who toured the site with his wife, Columba, did not announce the visit so reporters would not accompany them, “out of respect for the site and those affected,” Bloomberg reported.

The presidential hopeful also visited a memorial wall in Warsaw, saying, “Moving visit to Memorial Wall in Warsaw. Columba and I paid tribute to the many who died for Polish freedom.”