New German Foreign Minister Guido Westerwelle will visit Poland this week on his first official trip abroad, Poland"s prime minister said today, welcoming it as a sign of improving ties between the countries, according to Reuters. Chancellor Angela Merkel"s new cabinet was sworn in on Wednesday and her coalition government"s agreement gave a special mention to Polish-German ties, which had been under strain in recent years. "I was very happy when I learned that our foreign ministers agreed such a quick visit. Polish-German relations are as good as ever and we must do all we can to make them even better," said Donald Tusk told a news conference. Historical rows dating back to World War Two have traditionally weighed on relations between Warsaw and Berlin and hit rock bottom under Poland"s previous, eurosceptic, government of Jaroslaw Kaczynski, a conservative. Kaczynski"s twin brother and Poland"s president, Lech, will receive Westerwelle on his trip to Warsaw on Saturday. "This is not by chance. It shows our desire for good neighbourly relations with our eastern neighbour," Westerwelle said about his trip, which includes a meeting with Polish Foreign Minister Radoslaw Sikorski.