Question: Girolamo Amaldi is a professor of what at the oldest university in continuous operation in Europe? 

Context paragraphs:
University of Bologna: The University of Bologna (Italian: "Università di Bologna" , UNIBO), founded in 1088, is the oldest university in continuous operation, as well as one of the leading academic institutions in Italy and Europe.  It is one of the most prestigious Italian universities commonly ranking first in national rankings.

Charles University: Charles University, known also as Charles University in Prague (Czech: "Univerzita Karlova" ; Latin: "Universitas Carolina" ; German: "Karls-Universität" ) or historically as the "University of Prague" (Latin: "Universitas Pragensis" ), is the oldest and largest university in the Czech Republic.  Founded in 1348, it was the first university in Central Europe.  It is one of the oldest universities in Europe in continuous operation and ranks in the upper 1.5 percent of the world’s best universities.

Girolamo Arnaldi: Born in Pisa, in 1951 Arnaldi graduated in Medieval History at the University of Naples, and then completed his postgraduate studied at the in the same city.  He was professor of Medieval History at the University of Bologna from 1964 to 1970 and at the Sapienza University of Rome from 1970 to 1999.  Between 1966 and 1970 he was president of the (ISIME) in Rome.

University of Coimbra: The University of Coimbra (UC; Portuguese: "Universidade de Coimbra" , ] ) is a Portuguese public university in Coimbra, Portugal.  Established in 1290 in Lisbon, it went through a number of relocations until it was moved permanently to its current city in 1537, being one of the oldest universities in continuous operation in the world, the oldest university of Portugal, and one of the country's largest higher education and research institutions.

Ugo Amaldi: Ugo Amaldi; born 1934.  is an Italian physicist.  He is the son of the first CERN secretary general Edoardo Amaldi.  Ugo Amaldi is currently a professor at University of Milan, having previously worked at Istituto Superiore di Sanità and CERN.  He holds honorary doctorates from University of Lyon, University of Uppsala (1993), University of Valencia and University of Helsinki.  He is a Fellow of the European Physical Society, a Distinguished Affiliated Professor at Technical University of Munich, member of the Accademia dei Lincei and also awarded the Bruno Pontecorvo Prize by CERN.  He also founded the Hadron Therapy Project at CERN in 1991.

Rhodes University: Rhodes University is a public research university located in Grahamstown in the Eastern Cape Province of South Africa.  It is one of four universities in the province.  Established in 1904, Rhodes University is the province's oldest university, and it is the fifth or sixth oldest South African university in continuous operation, being preceded by the University of the Free State (1904), University of Witwatersrand (1896), Stellenbosch University (1866) and the University of Cape Town (1829).  Rhodes was founded in 1904 as Rhodes University College, named after Cecil Rhodes, through a grant from the Rhodes Trust.  It became a constituent college of the University of South Africa in 1918 before becoming an independent university in 1951.

Holbrooke Hotel: The Holbrooke Hotel is located in Grass Valley, California, USA.  It is notable as the oldest hotel that has been in continuous operation in California's Mother Lode.  The hotel was built in 1862 in mid-19th century Mother Lode masonry architectural style, and incorporated the Golden Gate Saloon which has been in continuous operation since 1852.

University of Naples Federico II: The University of Naples Federico II (Italian: "Università degli Studi di Napoli Federico II" ) is a university located in Naples, Italy.  Founded in 1224 it is the oldest public non-religious university in the world, and is now organized in 13 faculties.  It was Europe's first university dedicated to training secular administrative staff, and one of the oldest academic institutions in continuous operation.  Federico II is the third University in Italy by number of students enrolled, despite its huge dimensions it still represents one of the best Universities in Italy being an excellence in particular for research; in 2015 it was ranked among the first 100 universities in the world by citations per paper.  In 2016 it's the only generalist Italian university in the Times higher education reputation, which considers the best 200 best universities in the world.  The university is named after its founder Frederick II.

Continuous operation: In telecommunication, continuous operation is an operation in which certain components, such as nodes, facilities, circuits, or equipment, are in an operational state at all times.  Continuous operation usually requires that there be fully redundant configuration, or at least a sufficient "X" out of "Y" degree of redundancy for compatible equipment, where "X" is the number of spare components and "Y" is the number of operational components.

University of Oxford: The University of Oxford (informally Oxford University or simply Oxford) is a collegiate research university located in Oxford, England.  It has no known date of foundation, but there is evidence of teaching as far back as 1096, making it the oldest university in the English-speaking world and the world's second-oldest university in continuous operation.  It grew rapidly from 1167 when Henry II banned English students from attending the University of Paris.  After disputes between students and Oxford townsfolk in 1209, some academics fled north-east to Cambridge where they established what became the University of Cambridge.  The two "ancient universities" are frequently jointly referred to as "Oxbridge".

Supporting paragraphs: Girolamo Arnaldi University of Bologna
Answer: Medieval History