In February 3, 1886, he left Paris for Heidelberg, Germany. He attended lectures and training at the University of Heidelberg where he was said to have completed his eye specialization. Afterward, Rizal settled for three months in the nearby village, Wilhemsfeld, at the pastoral house of a Protestant pastor, Dr. Karl Ullmer.
It was during this time that the correspondence and long-distance friendship between Jose and Ferdinand Blumentritt began. Rizal wrote a letter in German and sent it with a bilingual (Spanish and Tagalog) book Aritmiteca to Blumentritt who was interested in studying Jose's native language.
Jose traveled next to Leipzig and attended some lectures at its university. Having reached Dresden afterward, he met and befriended Dr. Adolph B. Meyer, the Director of the Anthropological and Ethnological Museum. Also a Filipinologist, Meyer showed Rizal some interesting things taken from tombs in the Philippines.
In November 1886, he went to Berlin and further enhanced his skills and knowledge in ophthalmology. In that famous city, not only did he learn other languages but also became member of various scientific communities and befriended many famed intellectuals at the time. On February 21, 1887, he finished his first novel, the Noli, and it came off the press a month later.
With his friend Maximo Viola who loaned him some amount to cover for the printing of the Noli, Rizal traveled to various places in Europe. Through Paciano's remittance, Jose had paid Viola and decided to further explore some places in Europe before returning to the Philippines. They went first to see Potsdam, a city southwest of Berlin (which later became the historical site of the Potsdam Conference in 1945 in which the leaders of powerful nations deliberated upon the postwar administration of Germany.)
On May 11, 1887, they left Berlin for Dresden and witnessed the regional floral exposition there. Wanting to see Blumentritt, they went to Leitmeritz, Bohemia passing through Teschen (Decin, Czechoslovakia). Professor Blumentritt warmly received them at Leitmeritz railroad station. The professor identified Jose through the pencil sketch, which he (Rizal) had previously made of himself and sent to Blumentritt. The professor acted as their tour guide, introducing them to his family and to famous European scientists, like Dr. Carlos Czepelak and Prof. Robert Klutschak.
On May 16, the two Filipinos left Leitmeritz for Prague where they saw the tomb of the famous astronomer Copernicus (who formulated a heliocentric model of the universe, which placed the Sun, rather than the Earth, at the center). They stopped at Brunn on their way to Vienna. They met the famed Austrian novelist Norfenfals in Vienna, and Rizal was interviewed by Mr. Alder, a correspondent of the newspaper Extra Blatt ("Rizal in Vienna." n.d.).
To see the sights of the Danube River, they left Vienna in a boat where they saw passengers using paper napkins. From Lintz, they had a short stay in Salzburg. Reaching Munich, they tasted the local beer advertised as Germany's finest. In Nuremberg, they saw the infamous torture machines used in the so-called Catholic Inquisition. Afterward, they went to Ulm and climbed Germany's tallest cathedral there. They also went to Stuttgart, Baden, and then Rheinfall where they saw Europe's most beautiful waterfall.