Jakub Krzewina is a Polish track and field sprinter who specialises in the 400 metres. A frequent competitor for Poland in the 4×400 metres relay, he has won two medals at the European Athletics Championships and reached the final at the 2016 Summer Olympics. He was also a relay silver medallist with Europe at the 2014 IAAF Continental Cup.

Kruszwica is a town in central Poland, in the Inowrocław County in the Kuyavian-Pomeranian Voivodeship. It has a population of 9,161 (2010). Initially founded in the 6th century, Kruszwica is the oldest town in the region and features a medieval castle with a 12th-century Romanesque church. It is situated on the shores of Gopło Lake in the historic region of Kuyavia.