I am going to Frankfurt in Feb, and want to see if there is something there that I should not miss. Thanks
It does kind of depend on your interests, so not sure if I should recommend any museums or not, or which ones, but the top ones are: Staedel Leibieg Haus The Schirn Film Museum
Judengasse Museum Museum of Modern Art Other important sites would be the Kaiserdom, where the election of the Holy Roman Emperors took place since 1152, and the coronations since 1562, (climb the steeple built in 1415), the Emperors Hall with the full portraits of 52 of the Emperors - located in the Roemer which is the city hall for Frankfurt since 1405, Alte Nikolai - built in 1290, Deutsche Orden Church (Teutonic Order of Knights) - built in 1309, the Karmeliter Cloister with the wall paintings done by Joerg Ratgeb in 1513-1521, Eschenheimer Turm - guard tower built in 1425, Alte Oper - built in 1880, the Jewish Holocaust Memorial Wall, the Staufen Mauer (built in 1180, used as the Jewish Ghetto Wall from 1462-1810), the Paulskirche - where the 1st freely elected parliament took place in Germany in 1848, the Klein Markt Halle - indoor produce market + meats, cheeses, bakeries, chocolates, spices, and more, the Palmengarten, the Frankfurt Stock Exchange, go up on the Main Tower, the Berger strasse, the farmers market on the Konstablerwache on Thur. & Sat. (also on the Schiller Str. on Fri.) visit Sachsenhausen on a Fri. or Sat. night. If you have time and it is a weekend, go to the neighborhood of Hoechst and see the Justinus Church. Consecrated in 850, it is the only church in Germany to have been used as a church ever since. Very Carolingen inside, with fabulous pillars. The Baroque organ is also beautiful. Hoechst itself is like stepping back in time, with houses set up on the city walls, lots of fachwerk, a schloss, etc.