Sofia

It was here that the Cyril and Methodi Brothers developed The Standard Cyrillic Alphabet. Bulgaria was twicw liberated and freed by Russian troops, from The Turkish in 1877, ended the five centuries occupation and from Th German in 1944 during the WW II.
Sofia is the capital city and it was also the capital of The Roman Province of Dacia. The huge white marble buildings, wide avenues, gigantic squares dominate the center of the city. Walk along the Slivinica River, stop at a coffee shop or taste the drinking water which is probably one of the best in Europe.
The Alexander Nevsky Church, built in the beginning of the XX centuries in recognition of the 200.000 Russians who died during Russo-Turkish war in 1877-1878.

Visit the Crypt which has an enormous collection of painted icons and religious artifacts from the past thousands years. The Old Royal Palace now houses the National Gallery which has a collection of modern Bulgarian paintings and uninspiring ethnographic museum

Budapest

Located between the Buda Hills and The Great Hungarian Plain, it's a great combination between the two-thousand year history of the Magyars and The Socialist community, it is a city of  forgotten corners and glowing monuments.
This city will be very crowded in both July and August. Try to dine in a restaurant which has a fantastic view to the river of Danube and the city at night as well as a classical gipsy music. You'll find a lot of cheap restaurants including biztrous, grills, and self-services.

The castles of Buda, the ancient city of Obuda and the center city of Pest developed as three separated towns until 1873, and finally they merged into one municipality.
Buda and Obuda located on the west bank suburban residential areas on the slope of their seven hills. The Royal Palace built in 13 century destroyed during WW II, rebuilt again, has two museums National Gallery and Castle Museum.

Krakow

It's an elegant city, where Pope John Paul was born, it has a glorious heritage, like the Renaissance style of 
Wawel Castle  on the Wisla River. In the entire Stary Miosto (old city) is just lovely,  take a slow walk and stroll along the old city to enjoy them, visit the Rynek (market square), the Kosciol Mariachi, the most beautifully decorated cathedrals in Poland.
In the center of the Rynek, find the Sukiennice (cloth hall), where ion the second floor houses an excellent collection of modern Polish arts, including works by Stanislaw Wyspionski.
Take a look the greatest treasure of Krakow, i.e. Wawel Castle, a massive complex of  profane and sacred architecture. built in the Xth century, and rebuilt again in the XVIth century.
It also has several small museums , like the Kamienica Szolayskich with statue of Madonna of Kruzlowa, the Zbiory Czartonyskich with western European paintings like da Vinci's "Lady with the Ermine" and Rembrand's "Landscape with the good Samaritan"

The Jagiellon University is second oldest in eastern Europe after Prague, founded by King Casimir the Great in 1364.