TypeError: 'tuple' object is not callable; matplotlib figsize

Question

import math
import pandas_datareader as web
import numpy as np
import pandas as pd
from sklearn.preprocessing import MinMaxScaler
from keras.models import Sequential
from keras.layers import Dense, LSTM
import matplotlib.pyplot as plt
plt.style.use('fivethirtyeight')

...(Other code loading my data)...

plt.figure(figsize=(16,8))

My code throws an error. Any ideas?

TypeError                                 Traceback (most recent call last)
<ipython-input-74-d717924e19f2> in <module>()
      1 #visualize
----> 2 plt.figure(figsize=(16,8))
      3 plt.title('Close Price History')
      4 plt.plot(df['Close'])
      5 plt.xlabel('Date', fontsize=18)

TypeError: 'tuple' object is not callable